Oblicz obwód :
Ob=2*(3x-7) + 2*(y+3) +2*(y-8)=6x-14+2y+6+2y-16=6x+4y-24
O = 2*(y-8) +2*(y+3)+2*(3x-7) = 2y - 16 + 2y + 6 + 6x - 14 = 4y + 6x -24
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Ob=2*(3x-7) + 2*(y+3) +2*(y-8)=6x-14+2y+6+2y-16=6x+4y-24
O = 2*(y-8) +2*(y+3)+2*(3x-7) = 2y - 16 + 2y + 6 + 6x - 14 = 4y + 6x -24