SOLUTION: what is the answer to this: the square root of the sum of a number and 7 is 8. find the number

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Question 139885This question is from textbook Algebra 1
: what is the answer to this: the square root of the sum of a number and 7 is 8. find the number This question is from textbook Algebra 1

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
what is the answer to this:
Let x = "a number"
:
"the square root of the sum of a number and 7 is 8."
sqrt%28x%2B7%29 = 8
:
x + 7 = 64; squared both sides
:
x = 64 - 7
:
x = 57
:
:
Check solution:
sqrt%2857%2B7%29 = 8