Respuesta :

replace f(x) by f(x)=9x-6
a. 9x-6+7= 9x+1

replace x by (x+7) into eqn of 9x-6
b. 9(x+7)-6=9x+63-6=9x+57

replace f(x) by f(x)=9x-6
c. 7(9x-6)=63x-42

replace x by (7x) into eqn of 9x-6
d. 9(7x)-6=63x-6