(X+9)+(2x+6)=90

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Solution for (X+9)+(2x+6)=90 equation: 



(X+9)+(2X+6)=90

We move all terms to the left:

(X+9)+(2X+6)-(90)=0

We get rid of parentheses

X+2X+9+6-90=0

We add all the numbers together, and all the variables

3X-75=0

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

3X=75

X=75/3

X=25

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