Răspuns :
a/b = 5/10 => 10a=5b
a+b=75 => a = 75-b
10 (75-b) = 5b
750-10b=5b
750=15b
b=750:15
b=50
a=75-b
a=75-50
a=25
a+b=75 => a = 75-b
10 (75-b) = 5b
750-10b=5b
750=15b
b=750:15
b=50
a=75-b
a=75-50
a=25