### Home > INT3 > Chapter 12 > Lesson 12.1.4 > Problem 12-62

12-62.

Solve the system of equations below. Homework Help ✎

*x*+*y*+*z*= 40

*y*=*x*– 5

*x*= 2*z*

Use substitution to solve.

If *x* = 2*z*, then *y* = 2*z* − 5.

Now that you have expressions for both *x* and *y* in terms of *z*, substitute them into the first equation and solve for *z*.

Then solve for *x* and *y*.