Question

rapiddd dau coroana!!!!ex 4​

Answer 1

2/6 din rest= 20 ==> 1/6 = 10 ==> 6/6= 60

6/7 din X, unde X =nr de nuferi, = 60

==> 1/7 = 10 ==> X= 7×10 = 70

Answer 2

Răspuns:

x/7 au inflorit a2a zi

⁷⁾x-x/7=6x/7 rest

6x/7·4/6=4x/7 au inflorit a3a zi

x/7+4x/7+⁷⁾20=⁷⁾x

x+4x+140=7x

140=7x-5x

x=140:2=>x=70 nuferi pe lac