### Home > CCA > Chapter 1 > Lesson 1.1.2 > Problem 1-22

1-22.

If an input of –9 is put into each of the machines at right, what is each output?

Substitute −9 for

*x*in each of the equations in both the machines, then solve the equations for*y*.Function B: No solution. Do you know why?

Eric wants to get an output of 0. Can he do this with each machine? If so, how? If not, why not?

What numbers could Eric substitute in the equations to get 0?

Is it possible to get this answer from both machines?