(3x+7)+(5x-15)=90

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Solution for (3x+7)+(5x-15)=90 equation: 



(3x+7)+(5x-15)=90

We move all terms to the left:

(3x+7)+(5x-15)-(90)=0

We get rid of parentheses

3x+5x+7-15-90=0

We add all the numbers together, and all the variables

8x-98=0

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

8x=98

x=98/8

x=12+1/4

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