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-1+m=m-8
We simplify the equation to the form, which is simple to understand
-1+m=m-8
We move all terms containing m to the left and all other terms to the right.
+1m-1m=-8+1
We simplify left and right side of the equation.
m=-7
0=-7
The left and right sides are not equal, therefore there is no solution. This equation is invalid.
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