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

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



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

We move all terms to the left:

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

We get rid of parentheses

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

We add all the numbers together, and all the variables

3X-100=0

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

3X=100

X=100/3

X=33+1/3

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