Răspuns :
a+b=49
a=2b/5
2b/5 + b = 49 lx5
2b+5b=49x5
7b=49x5
b=(49x5)/7
b=35 =>a=14
a=2b/5
2b/5 + b = 49 lx5
2b+5b=49x5
7b=49x5
b=(49x5)/7
b=35 =>a=14
a+b=49
a=2/5 din b
Grafic avem
a l----l----l }suma=49
b l----l----l----l----l----l
49:7=7 (1/5)
2x7=14 (a)
5x7=35(b)
a=2/5 din b
Grafic avem
a l----l----l }suma=49
b l----l----l----l----l----l
49:7=7 (1/5)
2x7=14 (a)
5x7=35(b)