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12m-m-7m+3=0
We simplify the equation to the form, which is simple to understand
12m-m-7m+3=0
We move all terms containing m to the left and all other terms to the right.
+12m-1m-7m=0-3
We simplify left and right side of the equation.
+4m=-3
We divide both sides of the equation by 4 to get m.
m=-0.75
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