CLASS 7 MATHS · SIMPLE EQUATIONS

Solve simple equations

Undo the operations in reverse order, doing the same thing to both sides.

Loading practice…

Worked examples

Example 1 · level 1

Solve: 5x + 7 = −18

Show solution

5x = −18 − 7 = −25.
x = −25 ÷ 5 = −5.

Answer: -5

Example 2 · level 2

Solve: x/9 + 2 = 0

Show solution

x/9 = 0 − 2 = −2.
x = −2 × 9 = −18.

Answer: -18

Example 3 · level 3

Rohan thinks of a number, subtracts 2, and multiplies the result by 5. The answer is 0. What was the number?

Show solution

5(x − 2) = 0.
x − 2 = 0 ÷ 5 = 0.
x = 2.

Answer: 2