300=20x+40

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Solution for 300=20x+40 equation: 



300=20x+40

We move all terms to the left:

300-(20x+40)=0

We get rid of parentheses

-20x-40+300=0

We add all the numbers together, and all the variables

-20x+260=0

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

-20x=-260

x=-260/-20

x=+13

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