 
<translate> (x*3*1)/100 + [{4000 - x) *5*1]/100 = 144 3x/100 + 200 - 5x/100 = 144 2x/100 = 56 × x = 2800 Azịza ya bụ: (A). <eng> (x*3*1)/100 + [(4000 - x)*5*1]/100 = 144
3x/100 + 200 â€“ 5x/100 = 144
2x/100 = 56 Ã¨ x = 2800 The answer: (A). 