(6x-8)+(5x+21)=90

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Solution for (6x-8)+(5x+21)=90 equation: 



(6x-8)+(5x+21)=90

We move all terms to the left:

(6x-8)+(5x+21)-(90)=0

We get rid of parentheses

6x+5x-8+21-90=0

We add all the numbers together, and all the variables

11x-77=0

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

11x=77

x=77/11

x=7

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