### Home > PC > Chapter 5 > Lesson 5.2.3 > Problem 5-77

5-77.

Divide the second equation into the first equation to eliminate *a*.

Solve one equation for '*a*' and substitute that expression into the second equation.

5-77.

Divide the second equation into the first equation to eliminate *a*.

Solve one equation for '*a*' and substitute that expression into the second equation.