### Home > PC3 > Chapter 3 > Lesson 3.1.1 > Problem3-16

3-16.

Solve for $x$ and $y$:   \begin{aligned} [t] 3 x - 2 y = a \\ x + y = b \quad \end{aligned}

Use either method below.

Method 1: Solve for $x$ in the second equation and substitute into the first equation.

Method 2: Multiply the second equation by $2$ and add to the first equation, eliminating $y$.