ile to jest
13x-2y+7-9x+y-4+x-3 dla x= 0,2 , y=-1
13x-2y+7-9x+x-3
13x0,2-2x(-1)+7-9x0,2-1-4+0,2-3=2.6+9-1,8-5+0,2-3=11,6-9,8+0,2=1,8+0,2=2
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13x-2y+7-9x+x-3
13x0,2-2x(-1)+7-9x0,2-1-4+0,2-3=2.6+9-1,8-5+0,2-3=11,6-9,8+0,2=1,8+0,2=2