Răspuns :
3a = 2b
a + b = 250 ⇒ a = 250 - b
3 ( 250 - b ) = 2b
750 - 3b = 2b
750 = 5b
b = 750 : 5
b = 150
a = 250 - 150
a = 100
3a =2B
a+b= 250-a=250-b
3(250-b)=2b
750-3b=2b
750=5b
B=750:5
B=150
A=250-150
A=100
a+b= 250-a=250-b
3(250-b)=2b
750-3b=2b
750=5b
B=750:5
B=150
A=250-150
A=100