(3x+9)+(x-11)=90

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Solution for (3x+9)+(x-11)=90 equation: 



(3x+9)+(x-11)=90

We move all terms to the left:

(3x+9)+(x-11)-(90)=0

We get rid of parentheses

3x+x+9-11-90=0

We add all the numbers together, and all the variables

4x-92=0

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

4x=92

x=92/4

x=23

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