Question

a) 3 (x – 1) + 2 (x + 4) = 20

Answer 1

$a) \: 3 \times (x - 1)+ 2 \times (x + 4) = 20$

$3x - 3 + 2x + 8 = 20$

$3x + 2x = 20 + 3 - 8$

$5x = 15$

$x = \frac{15}{5}$

$x = 3$