-4x+8x-7x=15

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Solution for -4x+8x-7x=15 equation: 



-4x+8x-7x=15

We move all terms to the left:

-4x+8x-7x-(15)=0

We add all the numbers together, and all the variables

-3x-15=0

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

-3x=15

x=15/-3

x=-5

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