x+(2x+20)+2(2x+20)=690

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Solution for x+(2x+20)+2(2x+20)=690 equation: 



x+(2x+20)+2(2x+20)=690

We move all terms to the left:

x+(2x+20)+2(2x+20)-(690)=0

We multiply parentheses

x+(2x+20)+4x+40-690=0

We get rid of parentheses

x+2x+4x+20+40-690=0

We add all the numbers together, and all the variables

7x-630=0

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

7x=630

x=630/7

x=90

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