(3x-20)+(7x+10)=90

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Solution for (3x-20)+(7x+10)=90 equation: 



(3x-20)+(7x+10)=90

We move all terms to the left:

(3x-20)+(7x+10)-(90)=0

We get rid of parentheses

3x+7x-20+10-90=0

We add all the numbers together, and all the variables

10x-100=0

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

10x=100

x=100/10

x=10

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