### Home > CCA > Chapter 4 > Lesson 4.2.4 > Problem4-76

4-76.

Solve each equation for the indicated variable.  Homework Help ✎

1. $y = m x + b \quad ( \text { for } b )$

• Isolate b on one side by moving mx to the other.

1. $y = m x + b \quad ( \text { for } x )$

• Isolate x on one side by moving b and then dividing by m.

1. $I = p r t \quad ( \text { for } t )$

• Refer to parts (a) and (b) for help.

1. $A = p + p r t \quad ( \text { for } t )$

• Refer to parts (a) and (b) for help.

${\frac{A-p}{pr}}$