(2x-20)+(x-10)=90

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Solution for (2x-20)+(x-10)=90 equation: 



(2x-20)+(x-10)=90

We move all terms to the left:

(2x-20)+(x-10)-(90)=0

We get rid of parentheses

2x+x-20-10-90=0

We add all the numbers together, and all the variables

3x-120=0

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

3x=120

x=120/3

x=40

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