Gọi SL là a, SB là b
Ta có: a+b=736 ; b= 0,75x a => b= 3/4x a
Thay vào a+b=736=>a+3/4x a=736
=>7/4x a = 736=>a= 736:7/4= 2944/7
=>b=2944/7 x 3/4= 2208/7
=> a--b=2944/7 -- 2208/7= 736/7
Vậy: ..................................................................(continue) Bye......(^_^)