The sum of two number is 21. Twice the larger number is four times the smaller number. Find both numbers. .. Ok so I understand A+B=21 is the first expression and I think the second expression reads as 2b=4a. Now what?

Question

***[isuru]*** · Answer

Hi,
    u have almost finished the work bro...
          2B = 4A
         
   now get an expression for either A or B ... let's take A here
               A = 2B/4 =B/2

  now substitute B/2 = A in A + B = 21 
   and u could get the answer with ur eyes shut!!!!

hope this will help ya !

***[isuru]*** · Answer

Did u get  it or do u need help in simplification ..:-) ?

anonymous · Answer

I'm rewriting it now to make sure I understand. My apologies, it takes me a bit to process information-results of a bad car accident, so I'm a bit slower that most

***[isuru]*** · Answer

Oh ! I very sorry to hear that ... u can take ur time

anonymous · Answer

oh that's ok!! - I think I may have done this backwards... lol I have it reading as 2(42)=4(42/2) which makes it 84 on both sides.

***[isuru]*** · Answer

Let me give u a hand ...
        A + B = 21

we found out that A = (B/2)

 so 
     B/2 + B = 21

now solve this expression for B

anonymous · Answer

14?

***[isuru]*** · Answer

u got it bro... u r correct

anonymous · Answer

14/2 +b=21   reduced to 7 . subtract 7 from each side B=14

***[isuru]*** · Answer

yep!