Question

Tìm ab  biết 6ab  + ab  = 724

 

Answer 1

6ab + ab = 724

<=> ab x ( 6 + 1 ) = 724

<=> ab x 7 = 724

<=> ab = 724 :7

<=> ab = 724/7

Vậy ab = 724/7

Answer 2

ab+ab+600=724 Ab×2 = 724-600 Ab×2=124 Ab=124÷2 Ab=62