Solve for m
m=8
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m-4=4
Square both sides of the equation.
m-4-\left(-4\right)=4-\left(-4\right)
Add 4 to both sides of the equation.
m=4-\left(-4\right)
Subtracting -4 from itself leaves 0.
m=8
Subtract -4 from 4.
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