Given f (x) = 3/4x + 12, find the value of x when f (x) = x.

x=48

Step-by-step explanation:

f (x) is basically just another way to write y.

If f (x) = x, then y=x.

x=3/4x+12 (Original Equation Substituting x for f (x), equal to y)

1/4x=12 (Subtract 3/4 from both sides of the linear equation)

x=48 (Multiply both sides by 4)

48 = x

Step-by-step explanation:

3/4x + 12 = x

Subtract 3/4 x from each side

3/4x + 12-3/4x = x-3/4x

12 = 1/4x

Multiply each side by 4

12*4 = 1/4x * 4

48 = x