2(x+20)=4x+20

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Solution for 2(x+20)=4x+20 equation: 



2(x+20)=4x+20

We move all terms to the left:

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

We multiply parentheses

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

We get rid of parentheses

2x-4x-20+40=0

We add all the numbers together, and all the variables

-2x+20=0

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

-2x=-20

x=-20/-2

x=+10

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