Odpowiedź:
3xy- 4-3x+2xy+x+9 = 5xy-2x + 5= 5(0.5x4) -2x 0.5 +5 = 10-1+2 = 11
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Odpowiedź:
3xy- 4-3x+2xy+x+9 = 5xy-2x + 5= 5(0.5x4) -2x 0.5 +5 = 10-1+2 = 11