21-3m=18

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Solution for 21-3m=18 equation:


21-3m=18

We simplify the equation to the form, which is simple to understand 
21-3m=18

We move all terms containing m to the left and all other terms to the right. 
-3m=+18-21

We simplify left and right side of the equation. 
-3m=-3

We divide both sides of the equation by -3 to get m. 
m=1

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