-2x+x=400

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Solution for -2x+x=400 equation: 



-2x+x=400

We move all terms to the left:

-2x+x-(400)=0

We add all the numbers together, and all the variables

-1x-400=0

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

-x=400

x=400/-1

x=-400

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