Question

Twice the difference of a number and 3 is equal to three times the

sum of the number and 9  Find the number.

Answer 1

number - x


`2 |x - 3| = 3(x + 9) \\ 2 |x - 3| = 3x + 27 \\ |x - 3 | = 1.5x + 13.5`
2 Answer once when it minus and one when it plus
if plus

`x - 3 = 1.5x +13.5 \\ - 0.5x = 16.5 \\ x = - 33`
if minus

`- (x - 3) = 1.5x + 13.5 \\ - 2.5x = 10.5 \\ x = - 4.2`
these are the possible numbers