7x+2x+x=200

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Solution for 7x+2x+x=200 equation: 



7x+2x+x=200

We move all terms to the left:

7x+2x+x-(200)=0

We add all the numbers together, and all the variables

10x-200=0

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

10x=200

x=200/10

x=20

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