SOLUTION: ONE EIGHTH OF THE SQUARE ROOT OF 7 LESS THAN A NUMBER IS 2. WHAT IS THE NUMBER?

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Question 189185This question is from textbook Structure and Method Book 1
: ONE EIGHTH OF THE SQUARE ROOT OF 7 LESS THAN A NUMBER IS 2. WHAT IS THE NUMBER? This question is from textbook Structure and Method Book 1

Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
ONE EIGHTH OF THE SQUARE ROOT OF 7 LESS THAN A NUMBER IS 2. WHAT IS THE NUMBER?
:
%281%2F8%29sqrt%287-x%29 = 2
:
multiply both sides by 8
sqrt%287-x%29 = 16
:
Square both sides,
7 - x = 256
:
-x = 256 - 7
:
-x = 249
:
Multiply both sides by -1
x = -249
:
:
Check solution in original problem:
%281%2F8%29sqrt%287-%28-249%29%29 = 2
%281%2F8%29sqrt%287%2B249%29 = 2
%281%2F8%29sqrt%28256%29 = 2
%281%2F8%29%2816%29 = 2