### Home > A2C > Chapter 4 > Lesson 4.2.4 > Problem 4-123

4-123.

Consider the system of equations at right:

What is the parent of each equation?

Both equations are equations of lines.

Solve this system algebraically.

Multiply the first equation by

, then use elimination.

Now substitute the value found forinto the equation and solve for .Find where the two graphs intersect.

The graphs intersect at the solution to both equations.

Explain the relationship between parts (b) and (c) above.

See part (c).