12=-1-5m-8m

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Solution for 12=-1-5m-8m equation:


12=-1-5m-8m

We simplify the equation to the form, which is simple to understand 
12=-1-5m-8m

We move all terms containing m to the left and all other terms to the right. 
+5m+8m=-1-12

We simplify left and right side of the equation. 
+13m=-13

We divide both sides of the equation by 13 to get m. 
m=-1

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