-100=2x+40

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Solution for -100=2x+40 equation: 



-100=2x+40

We move all terms to the left:

-100-(2x+40)=0

We get rid of parentheses

-2x-40-100=0

We add all the numbers together, and all the variables

-2x-140=0

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

-2x=140

x=140/-2

x=-70

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