(x-20)+20+20=90

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



(x-20)+20+20=90

We move all terms to the left:

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

We add all the numbers together, and all the variables

(x-20)-50=0

We get rid of parentheses

x-20-50=0

We add all the numbers together, and all the variables

x-70=0

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

x=70

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