.4(20-10m)=2.5-2m-12.5

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Solution for .4(20-10m)=2.5-2m-12.5 equation: 



.4(20-10m)=2.5-2m-12.5

We move all terms to the left:

.4(20-10m)-(2.5-2m-12.5)=0

We add all the numbers together, and all the variables

.4(-10m+20)-(-2m-10)=0

We multiply parentheses

-4m-(-2m-10)+8=0

We get rid of parentheses

-4m+2m+10+8=0

We add all the numbers together, and all the variables

-2m+18=0

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

-2m=-18

m=-18/-2

m=+9

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