2*m-4=20

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Solution for 2*m-4=20 equation: 



2m-4=20

We move all terms to the left:

2m-4-(20)=0

We add all the numbers together, and all the variables

2m-24=0

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

2m=24

m=24/2

m=12

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