# Polynomials

Algebra Level pending

If polynomials $$u,v\in \mathbb{Z}[x]$$ such that

$(x^4-1)u(x)+(x^7-1)v(x)=x-1$

Find $$u(-1)+v(-1)$$.

Details

The set of polynomails with integer coefficients is defined as $$\mathbb{Z}[x]$$, for example $$x^3-2x^2+1\in \mathbb{Z}[x]$$.

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