(7x-13)+(x+7)=90

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Solution for (7x-13)+(x+7)=90 equation: 



(7x-13)+(x+7)=90

We move all terms to the left:

(7x-13)+(x+7)-(90)=0

We get rid of parentheses

7x+x-13+7-90=0

We add all the numbers together, and all the variables

8x-96=0

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

8x=96

x=96/8

x=12

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