13. Suppose your friend says he can solve the equation 15 – (2x + 6) = 1 (7x − 4) by first using the Multiplication Property of Equality to multiply each side of the equation by 2. Is he correct?

Answer 1

15 -2x -6 = 7x-4

5x =13

x = 13/5 = 2.6

multiplying by 2 doesn't seem to be a useful approach