1200-40x=400+40x

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



1200-40x=400+40x

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

-80x+800=0

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

-80x=-800

x=-800/-80

x=+10

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