3-7x=87

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Solution for 3-7x=87 equation: 



3-7x=87

We move all terms to the left:

3-7x-(87)=0

We add all the numbers together, and all the variables

-7x-84=0

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

-7x=84

x=84/-7

x=-12

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