How do you solve 3abs(-9 x-7)-2=13?

1 Answer
May 9, 2018

x = -4/3

x = -2/9

Explanation:

3|-9x-7|-2 = 13

add +2 for both sides

3|-9x-7| = 15
divide by 3 both sides

|-9x-7| = 5

so now what is inside the absolute value is equal to 5 and -5 solve it twice

-9x-7 = 5 and -9x-7 = -5

color(red)(x = -12/9 = -4/3)

and

-9x-7 = -5

color(red)(x = -2/9)

check your answers by substituting the values of x in the original equation and you will get both sides same value so your answer is correct/