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y - lis
2x=3y oraz 2y=x+5
4x=6y oraz 6y=3x+15
Teras mamy:
4x=3x+15
x=15 kg
pozdrawiam :))
x - waga borsuka
y - waga lisa
2x=3y
2y=x+5
x=3y/2
2y=3y/2+5 /*2
4y=3y+10
y=10
x=3*10/2
x=15
x=15kg
y=10kg
Borsuk waży 15kg
y- lis
2x=3y
2y-5=x
2(2y-5) = 3y
x=2y-5
y=10
x=15