Set up the composite result function.

Evaluate by substituting in the value of into .

Combine and .

To write as a fraction with a common denominator, multiply by .

Combine and .

Combine the numerators over the common denominator.

Apply the distributive property.

Multiply by .

Multiply by .

Subtract from .

Find f(g(x)) f(x)=3x-8 g(x)=(x+3)/8