8x+20=4x-40

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



8x+20=4x-40

We move all terms to the left:

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

We get rid of parentheses

8x-4x+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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