X=200+3x

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Solution for X=200+3x equation: 



X=200+3X

We move all terms to the left:

X-(200+3X)=0

We add all the numbers together, and all the variables

X-(3X+200)=0

We get rid of parentheses

X-3X-200=0

We add all the numbers together, and all the variables

-2X-200=0

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

-2X=200

X=200/-2

X=-100

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