### Home > INT1 > Chapter 8 > Lesson 8.1.5 > Problem8-74

8-74.

This problem is the checkpoint for rewriting equations with more than one variable. It will be referred to as Checkpoint 8A.

Solve each equation for the indicated variable.

1. $–3x + 5y = –10$ (for $y$)

1. $y = mx + b$ (for $x$)

1. $A = πr^{2}$ (for $r^{2}$)