x-(3x+100)=90

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Solution for x-(3x+100)=90 equation: 



x-(3x+100)=90

We move all terms to the left:

x-(3x+100)-(90)=0

We get rid of parentheses

x-3x-100-90=0

We add all the numbers together, and all the variables

-2x-190=0

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

-2x=190

x=190/-2

x=-95

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