### Home > CCA2 > Chapter 6 > Lesson 6.2.4 > Problem 6-143

6-143.

Write an equation for a machine that will undo Kirsta's machine. Call it . Homework Help ✎

Substitute for

*.*

Find the inverse by switching the

*and the*

*.*

Then solve for

*.*

6-143.

Write an equation for a machine that will undo Kirsta's machine. Call it . Homework Help ✎

Substitute for

Find the inverse by switching the

Then solve for