4x+20=8x-40

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Solution for 4x+20=8x-40 equation: 



4x+20=8x-40

We move all terms to the left:

4x+20-(8x-40)=0

We get rid of parentheses

4x-8x+40+20=0

We add all the numbers together, and all the variables

-4x+60=0

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

-4x=-60

x=-60/-4

x=+15

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