Question

Exercitiul 13 , 14 , 15 ! Dau coroana ! Urgeeeeeeeeent !!!!

Answer 1

13. m+n=350
n=6m
(in prima relatie scrii in loc de n, 6m)
m+6m=350
7m=350
m = 350:7
m = 50

n= 6×m n= 6×50
n=300

Verificare: 300+50=350

14. Lopeți=l
Greble = g

I+g=72
l=3g

3g+g=72
4g=72
g=72:4
g=18

L=3g
L=3×18
L=54

Verificare: 54+18=72

15. F+B =42
B= 3×(F-10)

F+3×(F-10)=42
F+3F-30=42
4F=30+42
4F=72
F= 72:4
F=18

F+B=42
18+B=42
B=42-18
B=24

Verificare: 18+24=42