Solve for x
x=144
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6=-6+\sqrt{x}
Subtract 10 from 4 to get -6.
-6+\sqrt{x}=6
Swap sides so that all variable terms are on the left hand side.
\sqrt{x}=6+6
Add 6 to both sides.
\sqrt{x}=12
Add 6 and 6 to get 12.
x=144
Square both sides of the equation.
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