7x+20=-5x-40

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Solution for 7x+20=-5x-40 equation: 



7x+20=-5x-40

We move all terms to the left:

7x+20-(-5x-40)=0

We get rid of parentheses

7x+5x+40+20=0

We add all the numbers together, and all the variables

12x+60=0

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

12x=-60

x=-60/12

x=-5

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