SOLUTION: PLEASE I need help on this test question asap. Thanks. Solve each equation for x. {{{sqrt(9x+378)=3sqrt(7x)}}} Step 1: Square both sides of the equation. Show your work. Step

Algebra ->  Rational-functions -> SOLUTION: PLEASE I need help on this test question asap. Thanks. Solve each equation for x. {{{sqrt(9x+378)=3sqrt(7x)}}} Step 1: Square both sides of the equation. Show your work. Step       Log On


   

Question 195038: PLEASE I need help on this test question asap. Thanks.
Solve each equation for x.
sqrt%289x%2B378%29=3sqrt%287x%29
Step 1: Square both sides of the equation. Show your work.
Step 2: Solve the equation from step 1 for x. Show your work.
Step 3: Check your solution from step 2 in the original equation. Show your work.
Step 4: State the solution for the equation sqrt%289x%2B378%29=3sqrt%287x%29
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt(9x+378)=3sqrt(7x)
9x+378=9*7x
9x+378=63x
9x-63x=-378
-54x=-378
x=-378/-54
x=7 ans.
proof:
sqrt(9*7+378)=3sqrt7*7
sqrt(63+378)=3sqrt49
sqrt441=3*7
21=21