Question

(b) S-5= 3(s + 3) + 2(s – 1)​

Answer 1

$s - 5 = 3(s + 3) + 2(s - 1) \\ \\ = > s - 5 = 3s + 9 + 2s - 2 \\ \\ = > s - 5 = 5s + 7 \\ \\ = > s - 5s = 7 + 5 \\ \\ = > - 4s = 12 \\ \\ = > - s = \frac{12}{4} \\ \\ = > s = - 3$