How do you solve \sqrt { x - 4} + 8= 9x4+8=9?

1 Answer
Nov 15, 2016

x=5x=5

Explanation:

sqrt(x-4) +8 =9x4+8=9

Subtract 88 from both sides, to isolate the radical.

sqrt (x-4)= 1x4=1

Square both sides to get rid of the radical.

x-4 = 1x4=1

Add 44 to both sides to isolate xx.

x= 5x=5

To check, if you plug 5=x5=x, the equation is proven equal.

sqrt (5-4) +8 = 954+8=9

9 = 9 ->9=9 Yes!

Hope that helped!