Răspuns:
elevi =1680
15 x 1680:100=25200:100=252elevi limba germana
40x1680:100= 67200:100=672 elevilimba francezn
1680 - (252+672)=1680-924=756 elevi limba engleza
100/100+40/100=55/100
100/100-55/100=45/100 elevi limba engleza
45 x 1680:100=75600:100=756