Question

Twice the sum of a number and six decreased by fifteen is the same as eighteen more than the product of five and the number. Find the number.

Answer 1

-9

Explanation:

2(n+6) -15 = 5n+18

2n + 12 - 15 = 5n + 18

2n - 3 = 5n + 18

2n = 5n + 21

-3n = 21

n = -9