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cena róży - y
4x+2y=16
y=2x
4x+2*2x=16
4x+4x=16
8x=16
x=2 zł
y=2*2
y=4 zł
Tulipan kosztuje 2 zł, a róza 4 zł.
x = 2y
4(2y) + 2y = 16
x = 2y
10y = 16 / 10
x = 2y
y = 1 3/5
x = 3 1/5
tulipan - 1,60 zł
róża - 3,20 zł