Ten 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?  Select the correct option.
A) 35	B) 38	C) 37	D) 36	E) 30
Let present age of P and Q be 3x and 4x respectively.   Ten years ago, P was half of Q's age   ⇒(3x−10)=12(4x−10)⇒6x−20=4x−10⇒2x=10⇒x=5   Total of their present ages   =3x+4x=7x3 +4= 
<gadget id="calculator">3 +4</gadget>
<output>7</output>
7x=7×5=35   35nswer is 35.
<result>A</result>
Ten 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?