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x-12=2\sqrt{2} x-12=-2\sqrt{2}
Take the square root of both sides of the equation.
x-12-\left(-12\right)=2\sqrt{2}-\left(-12\right) x-12-\left(-12\right)=-2\sqrt{2}-\left(-12\right)
Add 12 to both sides of the equation.
x=2\sqrt{2}-\left(-12\right) x=-2\sqrt{2}-\left(-12\right)
Subtracting -12 from itself leaves 0.
x=2\sqrt{2}+12
Subtract -12 from 2\sqrt{2}.
x=12-2\sqrt{2}
Subtract -12 from -2\sqrt{2}.
x=2\sqrt{2}+12 x=12-2\sqrt{2}
The equation is now solved.