X3+x4=-4x

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Solution for X3+x4=-4x equation: 



X3+X4=-4X

We move all terms to the left:

X3+X4-(-4X)=0

We add all the numbers together, and all the variables

X^3+X^4-(-4X)=0

We get rid of parentheses

X^3+X^4+4X=0

We do not support eXpression: X^3

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