Câu trả lời:
A x 50% + A x \(\dfrac{1}{5}\) + A + 98 = 103
A x \(\dfrac{50}{100}\) + A x \(\dfrac{1}{5}\) + A + 98 = 103
A x \(\dfrac{1}{2}\) + A x \(\dfrac{1}{5}\) + A + 98 = 103
A x (\(\dfrac{1}{2}\) + \(\dfrac{1}{5}\) + 1) + 98 =103
A x \(\dfrac{17}{10}\) + 98 = 103
A x \(\dfrac{17}{10}\) = 103 - 98
A x \(\dfrac{17}{10}\) = 5