Odpowiedź:
[tex]\displaystyle 3x +2x^{2} -5x+4-6x^{2} +20=-4x^{2} -2x+24\\-x+2x+(-6)+x-4=2x-10\\-5a+3b+5a-18b=-15b\\-3x+2y-4-5z+7x+y-3z+1=4x+3y-8z-3[/tex]
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Odpowiedź:
[tex]\displaystyle 3x +2x^{2} -5x+4-6x^{2} +20=-4x^{2} -2x+24\\-x+2x+(-6)+x-4=2x-10\\-5a+3b+5a-18b=-15b\\-3x+2y-4-5z+7x+y-3z+1=4x+3y-8z-3[/tex]