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equations are called the linear equations.
“The equation which contains a single variable with exponent 1 is
called the linear equation in one variable”, i.e,

ax + b = 0

9.2.1 Solving an Equation

We can use the idea of a balance to find the value of unknowns.

This process or method of finding the values of unknowns is called

solving an equation and the value of unknown is called the solution

or root of the equation. From the above example,

(subtract 2 from both sides)

Thus, 1 is the solution or root of the above equation.

Example 2: Find the solution of the following equations and verify
the solution.

Solution: (Cross multiplication)
(i) (Separate the variable and numbers)

Verification:

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