1200-40x=400-50x

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Solution for 1200-40x=400-50x equation: 



1200-40x=400-50x

We move all terms to the left:

1200-40x-(400-50x)=0

We add all the numbers together, and all the variables

-40x-(-50x+400)+1200=0

We get rid of parentheses

-40x+50x-400+1200=0

We add all the numbers together, and all the variables

10x+800=0

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

10x=-800

x=-800/10

x=-80

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