Question

f(x) = 4x - 9 step by step and put the right anwser so I can read it

Answer 1

f = -5

f(x) = 4x - 9

Add 9 to both sides

f(x) + 9 = 4x

Divide x from both sides

f + 9 = 4

Subtract 9 from both sides

f = -5

Please let me know if I am wrong.