Six years ago, P was half of Q's age. If the ratio of their present ages is 3:4 what will be the total of their present ages?
Choose the correct choice from the following answers
A) 33	B) 67	C) 29	D) 21	E) 35
Let present age of P and Q be 3x3x and 4x4x respectively.   Six years ago, P was half of Q's age   â‡’(3xâˆ’6)=1/2(4xâˆ’6)   â‡’6xâˆ’12=4xâˆ’6   â‡’2x=6   â‡’x=3   Total of their present ages   =3x+4x=7x3 +4= 
<gadget id="calculator">3 +4</gadget>
<output>7</output>
7x=7Ã—3=21   21
<result>D</result>
Six years ago, P was half of Q's age. If the ratio of their present ages is 3:4 what will be the total of their present ages?