zadanie 2 …DANE:
x- cena gumki
y- cena spinki
4x+6y=4,80
x+10y=4,60
4x+6y=4,80
x=4,60-10y
4(4,60-10y)+6y=4,80
x=4,60-10y
18,40-40y+6y=4,8
x=4,60-10y
18,40-4,80=40y-6y
x=4,60-10y
13,60=34y /:34
x=4,60-10y
y=0,40
x=4,60-10*0,40
y=0,40
x=4,60-4,00
y=0,40
x=0,60
ODP. JEDNA GUMKA KOSZTOWAŁA 0,60zł, a jedna spinka 0,40zł.