-X-31X+85+21X-21-3x=136-42

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Solution for -X-31X+85+21X-21-3x=136-42 equation: 



-X-31X+85+21X-21-3X=136-42

We move all terms to the left:

-X-31X+85+21X-21-3X-(136-42)=0

We add all the numbers together, and all the variables

-X-31X+21X-3X+85-21-94=0

We add all the numbers together, and all the variables

-14X-30=0

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

-14X=30

X=30/-14

X=-2+1/7

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