x+2x+(x-100)=900

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Solution for x+2x+(x-100)=900 equation: 



x+2x+(x-100)=900

We move all terms to the left:

x+2x+(x-100)-(900)=0

We add all the numbers together, and all the variables

3x+(x-100)-900=0

We get rid of parentheses

3x+x-100-900=0

We add all the numbers together, and all the variables

4x-1000=0

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

4x=1000

x=1000/4

x=250

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