How do you solve #7+ \sqrt { x - 1} = 9#?

1 Answer
Dec 2, 2016

#x=5#

Explanation:

#7+sqrt(x−1)=9#

Put x-1 on one side and move 7 to the other side.

#sqrt(x−1)=9-7#

#sqrt(x−1)=2#

To get rid of the square root, we square #sqrt(x−1)# by 2. But we have to square the other side too.

#x-1=2^2#

#x-1=4#

#x=4+1#

#x=5#