Question

Va rog frumoss, ma ajutați, maxim 3 sau 4 probleme, va rogggg, urgentttttt dau corana ​

Answer 1

12.

m=mese

p=participanți

p=4(m-3)

p=3m+14

4(m-3)=3m+14

4m-12=3m+14

m=26

p=4(26-3)=92

13.

l=lungimea drumului

a=l/3

b=(3/8)×(d-d/3)

c=25km

d/3+(3/8)×(d-d/3)+25=d

14d/24+600/24=d

Deci 10d=600; d=60km

14.

(a:5):3=21

a:5=21×3

a:5=63

a=63×5

a=315