A person's present age is two-fifth of the age of his mother. After 8 years, he will be one-half of the age of his mother. How old id the mother at present?	Choose the correct choice from the following:
A) 22	B) 77	C) 40	D) 26	E) 18
Let the mother's present age be x years. Then, the person's present age = 2/5 x years.   (2/5 x + 8) = 1/2 (x + 8)   2(2x + 40) = 5(x + 8) =&gt; x = 40   Answer: 40
<result>C</result>
A person's present age is two-fifth of the age of his mother. After 8 years, he will be one-half of the age of his mother. How old id the mother at present?