x+30=2x+40

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Solution for x+30=2x+40 equation: 



x+30=2x+40

We move all terms to the left:

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

We get rid of parentheses

x-2x-40+30=0

We add all the numbers together, and all the variables

-1x-10=0

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

-x=10

x=10/-1

x=-10

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