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

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Answer 1 · 2016-12-02T07:34:00

#x=5#

#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#