Solve for x
x=25
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3\sqrt{x}-8-\left(-8\right)=7-\left(-8\right)
Add 8 to both sides of the equation.
3\sqrt{x}=7-\left(-8\right)
Subtracting -8 from itself leaves 0.
3\sqrt{x}=15
Subtract -8 from 7.
\frac{3\sqrt{x}}{3}=\frac{15}{3}
Divide both sides by 3.
\sqrt{x}=\frac{15}{3}
Dividing by 3 undoes the multiplication by 3.
\sqrt{x}=5
Divide 15 by 3.
x=25
Square both sides of the equation.
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