3(800-20m)=4(1000-25m)

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Solution for 3(800-20m)=4(1000-25m) equation: 



3(800-20m)=4(1000-25m)

We move all terms to the left:

3(800-20m)-(4(1000-25m))=0

We add all the numbers together, and all the variables

3(-20m+800)-(4(-25m+1000))=0

We multiply parentheses

-60m-(4(-25m+1000))+2400=0



We calculate terms in parentheses: -(4(-25m+1000)), so:

4(-25m+1000)

We multiply parentheses

-100m+4000

Back to the equation:

-(-100m+4000)



We get rid of parentheses

-60m+100m-4000+2400=0

We add all the numbers together, and all the variables

40m-1600=0

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

40m=1600

m=1600/40

m=40

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