Question

A+b=50
B reprezinta doua treimi din a
A si b cat sunt??

Answer 1

a |--x--||--x--||--x--|
b |--x--||--x--|                } 50

5x = 50
x=50:5
x=10

a=10x3
a=30
b=10x2 = 20


Sau algebric
a+b=50
b=2a/3
a+2a/3 = 50  *3
3a+2a=150
5a=150
a=30
b=2*30/3
b=2*10
b=20

Answer 2

$a+b=50 \\ b= \frac{2a}{3} \\ \\ a+ \frac{2a}{3} =50 \\ \\ 3a+2a=150 \\ a=150:5 \\ a=30 \\ b= \frac{2}{3} 30=\ \textgreater \ b=30:3*2=\ \textgreater \ b=20$