6 times the sum of a number and 15 is -42

Question

6 * the sum of a number and 15 is -42

Answer 1

6(x+15) =-42

6x + 90 =-42

6x = -42-90 = -132

x = -132/6 =-22

or 6(-7) = -42

x+15=-7

x =-7-15=-22