Question

For r(x)= 3/4x - 4, find the value of x for which r(x) = -7

Answer 1

-7 = 3/4x - 4
-7 + 4 = 3/4x - 4 + 4
-3 = 3/4x
-3(4) = 3/4(4)x
-12 = 3x
-12/3 = 3x/3
-4 = x

Answer 2

Explanation:

3/4x - 4 = -7

3/4x = -3

3x = -12

x = -4