x+200=-3x+600

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Solution for x+200=-3x+600 equation: 



x+200=-3x+600

We move all terms to the left:

x+200-(-3x+600)=0

We get rid of parentheses

x+3x-600+200=0

We add all the numbers together, and all the variables

4x-400=0

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

4x=400

x=400/4

x=100

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