### Home > CC2 > Chapter 7 > Lesson 7.1.5 > Problem 7-58

7-58.

If is

*? Justify your answer in more than one way.*

Write out equations to represent these phrases.

Solve for in the first equation:

Substitute in the second equation.

7-58.

If is

Write out equations to represent these phrases.

Solve for in the first equation:

Substitute in the second equation.