X+(x+7)+(2x+5)=90

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Solution for X+(x+7)+(2x+5)=90 equation: 



X+(X+7)+(2X+5)=90

We move all terms to the left:

X+(X+7)+(2X+5)-(90)=0

We get rid of parentheses

X+X+2X+7+5-90=0

We add all the numbers together, and all the variables

4X-78=0

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

4X=78

X=78/4

X=19+1/2

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