Răspuns :
a+b=60
a=2/3b
2/3b+b=60
2b+3b=180 am adus la acelasi numitor
5b=180
b=180/5
b=36
a=2/3*36
a=24
a=2/3b
2/3b+b=60
2b+3b=180 am adus la acelasi numitor
5b=180
b=180/5
b=36
a=2/3*36
a=24