x-4x=87

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Solution for x-4x=87 equation: 



x-4x=87

We move all terms to the left:

x-4x-(87)=0

We add all the numbers together, and all the variables

-3x-87=0

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

-3x=87

x=87/-3

x=-29

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