Respuesta :

Answer:

13

Step-by-step explanation:

subtract 1 on both sides

then divide by 3

to get 13

Answer:13

Step-by-step explanation:

You have to find what "z" is so you would so 1+3 x Z so what would equal 40 when doing 1+3 x 13 = 40 so 13 would be your answer