Salut! =)
5 )
a / b = ?
a / b = 3 / 4
b - a = 11
a / b = 3/ 4 => 4a = 3b => a = 3b / 4
Inlocuim in a doua formula :
b - 3b / 4 = 11
Aducem la acelasi numitor :
4b - 3b = 44
b = 44
a = ( 3 × 44 ) / 4
a = 3 × 11
a = 33
Bafta! =)
