Solve for x
x=3
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2x+3=9
Square both sides of the equation.
2x+3-3=9-3
Subtract 3 from both sides of the equation.
2x=9-3
Subtracting 3 from itself leaves 0.
2x=6
Subtract 3 from 9.
\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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