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9+4x=9+4x+10
4x-4x=9+10-9
010 Jest to równanie sprzeczne
(5x-2)(3-x)=-6(1-x)(1+x)
15x-5x²-6+2x=-6(1-x²)
15x-5x²-6+2x=-6+6x²
15x-5x²+2x-6x²=-6+6
17x-11x²=0