### Home > A2C > Chapter 8 > Lesson 8.1.1 > Problem8-8

8-8.

Solve and check your solution: . Homework Help ✎

See problem 7-207 for help.

Place one radical on each side of the equation, then square.

$2\sqrt{21-\textit{x}}=5+\sqrt{3\textit{x}-6}$

Use a generic rectangle to help you square each side. You will still have a radical after this step. Isolate it and square again.

x = 5, remember to check your solution.