Răspuns :
a / b = 1, 5
a + b = 80
a = 1, 5 × b
1, 5 × b + b = 80
2, 5 × b = 80
b = 80 : 2, 5
b = 800 : 25
b = 32
a = 1, 5 × 32
a = 48
a / b = 1, 5
a + b = 80
a = 1, 5 × b
1, 5 × b + b = 80
2, 5 × b = 80
b = 80 : 2, 5
b = 800 : 25
b = 32
a = 1, 5 × 32
a = 48