3+4x-x=-15

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Solution for 3+4x-x=-15 equation: 



3+4x-x=-15

We move all terms to the left:

3+4x-x-(-15)=0

We add all the numbers together, and all the variables

3x+18=0

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

3x=-18

x=-18/3

x=-6

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