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y - cena batona
2x + 3y = 9,2
x = y + 1,1
2y + 2,2 + 3y = 9,2
x = y + 1,1
5y = 7
x = y + 1,1
y = 1,4
x = 2,5
Czekolada kosztowała 2,50 zł, a baton 1,40 zł
7:5=1,40 ------->cena batona
1,40+1,10= 2,50 zł ------> cena czeklady