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A statement of equality of two algebraic expressions involving one or more variables. Example: x + 2 = 3
- Linear Equation in One variable: The expressions which form the equation that contain single variable and the highest power of the variable in the equation is one.
- An algebraic equation is an equality involving variables. It says that the value of the expression on one side of the equality sign is equal to the value of the expression on the other side.
- The equations we study in Classes VI, VII and VIII are linear equations in one variable. In such equations, the expressions which form the equation contain only one variable. Further, the equations are linear, i.e., the highest power of the variable appearing in the equation is 1.
- A linear equation may have for its solution any rational number.
- An equation may have linear expressions on both sides. Equations that we studied in Classes VI and VII had just a number on one side of the equation.
- Just as numbers, variables can, also, be transposed from one side of the equation to the other.
- Occasionally, the expressions forming equations have to be simplified before we can solve them by usual methods. Some equations may not even be linear to begin with, but they can be brought to a linear form by multiplying both sides of the equation by a suitable expression.
- The utility of linear equations is in their diverse applications; different problems on numbers, ages, perimeters, combination of currency notes, and so on can be solved using linear equations.
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CBSE Class–VII |
CHAPTER – 1 Integers | NMMS Revision Notes à
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Tracing Changes Through a Thousand Years | NMMS Revision
Notes | Class 7 | Social à Click
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New Kings and Kingdoms | NMMS Revision Notes | Class 7 |
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The Delhi Sultanate | NMMS Revision Notes | Class 7
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The Mughal Empire | NMMS Revision Notes | Class 7 Social à Click Here
Tribes Nomads and Settled Communities | NMMS Revision
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Devotional Paths to the Divine | NMMS Revision Notes |
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The Making of Regional Cultures | NMMS Revision Notes |
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Eighteenth Century Political Formations | NMMS Revision
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Environment | NMMS Revision Notes | Class 7 Social à Click
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Inside Our Earth | NMMS Revision Notes | Class 7 Social à Click Here
Our Changing Earth | NMMS Revision Notes | Class 7 Social
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Air | NMMS Revision Notes | Class 7 Social à
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Water | NMMS Revision Notes | Class 7 Social à Click Here
Human Environment Interactions the Tropical | NMMS
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Life in the Deserts | NMMS Revision Notes | Class 7
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On Equality | NMMS Revision Notes | Class 7 Social à Click Here
How the State Government Works | NMMS Revision Notes |
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Role of the Government in Health | NMMS Revision Notes |
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Growing up as Boys and Girls | NMMS Revision Notes |
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Women Change the World | NMMS Revision Notes | Class 7
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Understanding Media | NMMS Revision Notes | Class 7
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Markets Around Us | NMMS Revision Notes | Class 7 Social à Click Here
A Shirt in the Market | NMMS Revision Notes | Class 7
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Nutrition in Plants | NMMS Revision Notes | Class 7
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Nutrition in Animals | NMMS Revision Notes | Class 7
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Heat | NMMS Revision Notes | Class 7 Science à Click
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Acids Bases And Salts | NMMS Revision Notes | Class 7
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Physical And Chemical Changes | NMMS Revision Notes |
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Respiration In Organisms | NMMS
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Transportation in Animals and
Plants | NMMS Revision Notes | Class 7 Science à Click
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Force and Pressure | NMMS
Quick Revision Notes | Class: 8 Physics à Click Here
Reproduction In Plants | NMMS
Revision Notes | Class 7 Science à
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Motion And Time | NMMS Revision
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Electric Current and its
Effects | NMMS Revision Notes | Class 7 Science à Click
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Light | NMMS Revision Notes |
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Waste Water Story | NMMS Revision Notes | Class 7 Science
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How When and Where | NMMS Revision Notes | Class 8 Social
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From Trade to Territory | NMMS Revision Notes | Class 8
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Ruling the Countryside | NMMS Revision Notes | Class 8
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Tribals Dikus and Vision of Golden Age | NMMS Revision
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When People Rebel | NMMS Revision Notes | Class 8 Social à Click Here
Weavers Iron Smelters and Factory Owners | NMMS Revision
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Civilising the Native Educating the Nation | NMMS
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Women Caste and Reform | NMMS Revision Notes | Class 8
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