Solve for x
x = \frac{279}{2} = 139\frac{1}{2} = 139.5
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2x+10=289
Square both sides of the equation.
2x+10-10=289-10
Subtract 10 from both sides of the equation.
2x=289-10
Subtracting 10 from itself leaves 0.
2x=279
Subtract 10 from 289.
\frac{2x}{2}=\frac{279}{2}
Divide both sides by 2.
x=\frac{279}{2}
Dividing by 2 undoes the multiplication by 2.
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