Solve for x
x=-3
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2x+31=25
Square both sides of the equation.
2x+31-31=25-31
Subtract 31 from both sides of the equation.
2x=25-31
Subtracting 31 from itself leaves 0.
2x=-6
Subtract 31 from 25.
\frac{2x}{2}=-\frac{6}{2}
Divide both sides by 2.
x=-\frac{6}{2}
Dividing by 2 undoes the multiplication by 2.
x=-3
Divide -6 by 2.
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