4m-9m=20

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Solution for 4m-9m=20 equation: 



4m-9m=20

We move all terms to the left:

4m-9m-(20)=0

We add all the numbers together, and all the variables

-5m-20=0

We move all terms containing m to the left, all other terms to the right

-5m=20

m=20/-5

m=-4

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