2(30-x)=40

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Solution for 2(30-x)=40 equation: 



2(30-x)=40

We move all terms to the left:

2(30-x)-(40)=0

We add all the numbers together, and all the variables

2(-1x+30)-40=0

We multiply parentheses

-2x+60-40=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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