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EX.2.1 Q1 Linear Equations in One Variable Solutions - NCERT Maths Class 8

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Question

Solve the equation:

\[x- 2= 7\]

 Video Solution
Linear Equations
Ex 2.1 | Question 1

Text Solution

What is known?

Equations

What is unknown?

Value of the variable

Reasoning:

In an equation values of left-hand side (LHS) and right-hand side (RHS) are equal. The two sides of the equation are balanced. We perform mathematical operations so that the balance is not disturbed.

Steps:

\[x- 2= 7\]

Transposing (\(-2\)) to RHS we get:

\begin{align}x &= {\rm{7}} + {\rm{ 2 }}\\\text{ }\!\!~\!\!\text{ }x&=9\end{align}