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2m-4m=4
We simplify the equation to the form, which is simple to understand
2m-4m=4
We move all terms containing m to the left and all other terms to the right.
+2m-4m=+4
We simplify left and right side of the equation.
-2m=+4
We divide both sides of the equation by -2 to get m.
m=-2
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