Answer) C. 77
This picture shows how I got to the answer. You must set up the two expressions to equal each other and then solve for X
Solve. -6 = 14 - z/3Subtract 14 from both sides
-20 = -z/3
Multiply -3 by both sides to get rid of the negative and 3 with the z.
z= 60

Substitute x = 3 in any given equations. I will do in y = - x + 1

Therefore the answer is (3,-2)
This one is probably f(x)=2(4)