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. What is the present age of the mother?  Choose one.
A) 25 B) 30 C) 35 D) 40 E) 45
Let present age of the mother =5x   Then, present age of the person =2x   5x+8=2(2x+8)5x+8=4x+16x=8present age of the mother =5x=40   Answer is 40.
<result>D</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. What is the present age of the mother?