x+2x+(x-100)=1100

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Solution for x+2x+(x-100)=1100 equation: 



X+2X+(X-100)=1100

We move all terms to the left:

X+2X+(X-100)-(1100)=0

We add all the numbers together, and all the variables

3X+(X-100)-1100=0

We get rid of parentheses

3X+X-100-1100=0

We add all the numbers together, and all the variables

4X-1200=0

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

4X=1200

X=1200/4

X=300

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