X+3x=-80

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Solution for X+3x=-80 equation: 



X+3X=-80

We move all terms to the left:

X+3X-(-80)=0

We add all the numbers together, and all the variables

4X+80=0

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

4X=-80

X=-80/4

X=-20

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