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?

• j=12;
  j=3b;
  b=12/3=4;
  twice as old so b=4(now)+(4)=8;
  jacob is 12+4=16
• 12 years agoHelpfull: Yes(42) No(1)
• present age of jacob=12
  let brother's age b x
  3x=12
  so x=12/3
  = 4
  ie brother is 4 yrs now
  (twice) 4+4=8
  so jacob will b 12+4=16
• 12 years agoHelpfull: Yes(20) No(0)
• j=12
  j=3b
  therefore 12=3b. hence b=4
  so there is a gap of 8 years between jacob and his brother
  so when brothers age becomes twice,b=8
  so when b=8, j=8(brothers age)+8(age gap)=16
• 11 years agoHelpfull: Yes(6) No(0)
• j=12;
  j=3b;so, b=4;
  12+x=2(4+x);
  x=4 years;
  so, j(will be)=12+4=16;
• 10 years agoHelpfull: Yes(2) No(0)
• current age 12
  so brothers age = 12/3 = 4
  twice = 4+4 = 8
  so jacobs age will be 12+4 = 16
• 10 years agoHelpfull: Yes(2) No(0)
• 16 yrs. Because brother is now 4 yrs old. when he will b 8 years old which will b 4 yrs later,Jacob will b 16 yrs old
  
• 9 years agoHelpfull: Yes(2) No(0)
• 12+4=16 simple
• 12 years agoHelpfull: Yes(1) No(10)
• J 12,His Bro....3 times younger:::::3(4)...Actual age 4.......>2(4)==8 then j age will be 12+4
• 9 years agoHelpfull: Yes(1) No(0)