140=-300-20x

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Solution for 140=-300-20x equation: 



140=-300-20x

We move all terms to the left:

140-(-300-20x)=0

We add all the numbers together, and all the variables

-(-20x-300)+140=0

We get rid of parentheses

20x+300+140=0

We add all the numbers together, and all the variables

20x+440=0

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

20x=-440

x=-440/20

x=-22

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