X+2x+(x+10)=90

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Solution for X+2x+(x+10)=90 equation: 



X+2X+(X+10)=90

We move all terms to the left:

X+2X+(X+10)-(90)=0

We add all the numbers together, and all the variables

3X+(X+10)-90=0

We get rid of parentheses

3X+X+10-90=0

We add all the numbers together, and all the variables

4X-80=0

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

4X=80

X=80/4

X=20

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