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Va rog urgent la ex 3,4,5 la 11,20 plec la scoala dau coroana

Va Rog Urgent La Ex 345 La 1120 Plec La Scoala Dau Coroana class=

Răspuns :

ex3 
(75......100)
(x..........24)
x=24*75/100

24*75/100=18
75-18=57

ex4
36*25/100=9 (fete)
25-9=16 (baieti)


3)
a=75
b=24/100x75=1800/100=18
a-b=75-18=57
4)
b=100%-36%=64%
b=64/100x25=1600/100=16 baieti
5)
Cat a rezolvat?
100%-65%=35%
35/100x40=1400/100=14 probleme