3x=-7x-80

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Solution for 3x=-7x-80 equation: 



3x=-7x-80

We move all terms to the left:

3x-(-7x-80)=0

We get rid of parentheses

3x+7x+80=0

We add all the numbers together, and all the variables

10x+80=0

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

10x=-80

x=-80/10

x=-8

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