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ułamek 3 1/3 = 10/3
ułamek 9,6 =48/5
układamy proporcje
2y do 10/3=48/5 do y
2y^2=10/3*48/5
po skróceniu
2y^2=32
y^2=16 i y>0
y=4
kolejna proporcja
8 do t-5=(9,6+8)dot
8t=17,6t-88
88=9,6t
48t=440
12t=110
6t=55
t=55/6
t=9 i 1/6
Odp B