Question

Solve: 3(x + 2) − 2(x − 1) = 7.

Answer 1

3(x + 2) − 2(x − 1) = 7.
or, $3\times x+3\times 2-2\times x-2\times (-1)=7$ [On expanding the brackets]
or, 3x + 6 − 2x + 2 = 7
or, x + 8 = 7
or, x + 8 − 8 = 7 − 8 [Subtracting 8 from both the sides]
or, x = −1