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m-1+2m+7+m+1=27
We simplify the equation to the form, which is simple to understand
m-1+2m+7+m+1=27
We move all terms containing m to the left and all other terms to the right.
+1m+2m+1m=+27+1-7-1
We simplify left and right side of the equation.
+4m=+20
We divide both sides of the equation by 4 to get m.
m=5
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