Solve for x
x=-56
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-42+\sqrt{60+x}=-40
Swap sides so that all variable terms are on the left hand side.
\sqrt{60+x}=-40+42
Add 42 to both sides.
\sqrt{60+x}=2
Add -40 and 42 to get 2.
x+60=4
Square both sides of the equation.
x+60-60=4-60
Subtract 60 from both sides of the equation.
x=4-60
Subtracting 60 from itself leaves 0.
x=-56
Subtract 60 from 4.
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