400-20x=200+30x

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Solution for 400-20x=200+30x equation: 



400-20x=200+30x

We move all terms to the left:

400-20x-(200+30x)=0

We add all the numbers together, and all the variables

-20x-(30x+200)+400=0

We get rid of parentheses

-20x-30x-200+400=0

We add all the numbers together, and all the variables

-50x+200=0

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

-50x=-200

x=-200/-50

x=+4

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