(x+20)+(3x-2)=90

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Solution for (x+20)+(3x-2)=90 equation: 



(x+20)+(3x-2)=90

We move all terms to the left:

(x+20)+(3x-2)-(90)=0

We get rid of parentheses

x+3x+20-2-90=0

We add all the numbers together, and all the variables

4x-72=0

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

4x=72

x=72/4

x=18

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