Jacob is 12 years old. He is 3 times as old as his brother. How old will Jacob be when he is twice as old? Select the correct option.
A) 13 B) 14 C) 15 D) 16 E) 17
j=12;   j=3b;   b=12/3= 
<gadget id="calculator">12/3</gadget>
<output>4</output>
4;   twice as old so b=4(now)+(4)=8;   jacob is  12+4= 
<gadget id="calculator"> 12+4</gadget>
<output>16</output>
16   ANSWER:16
<result>D</result>
Jacob is 12 years old. He is 3 times as old as his brother. How old will Jacob be when he is twice as old?