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2m-4=2m
We simplify the equation to the form, which is simple to understand
2m-4=2m
We move all terms containing m to the left and all other terms to the right.
+2m-2m=+4
We simplify left and right side of the equation.
m=+4
0=04
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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