(12x+7)+(20x-13)=90

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Solution for (12x+7)+(20x-13)=90 equation: 



(12x+7)+(20x-13)=90

We move all terms to the left:

(12x+7)+(20x-13)-(90)=0

We get rid of parentheses

12x+20x+7-13-90=0

We add all the numbers together, and all the variables

32x-96=0

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

32x=96

x=96/32

x=3

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