(X+11)+(2x+1)=90

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Solution for (X+11)+(2x+1)=90 equation: 



(X+11)+(2X+1)=90

We move all terms to the left:

(X+11)+(2X+1)-(90)=0

We get rid of parentheses

X+2X+11+1-90=0

We add all the numbers together, and all the variables

3X-78=0

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

3X=78

X=78/3

X=26

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