800-40m=1,200-90m

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Solution for 800-40m=1,200-90m equation: 



800-40m=1.200-90m

We move all terms to the left:

800-40m-(1.200-90m)=0

We add all the numbers together, and all the variables

-40m-(-90m+1.2)+800=0

We get rid of parentheses

-40m+90m-1.2+800=0

We add all the numbers together, and all the variables

50m+798.8=0

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

50m=-798.8

m=-798.8/50

m=-15+17.428571428572/17.857142857143

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