CPM Homework Help : CCA2 Problem 7-8

Solve and check your solution: $2 \sqrt { 21 - x } - \sqrt { 3 x - 6 } = 5$ .

Hint:

Graph each equation listed below.

$y= 2\sqrt{21-x}-\sqrt{3x-6}$

$y=5$

More Help:

Where do the curves intersect? Then, look back at the original equation. Do you need a solution for $x,\ \text{for}\ y$ , or for both?

Partial Answer:

$x=5$ , remember to check your solution.