Thursday, November 25, 2010

Age Problem 5 Solution

This is the algebra age word problem that read Pol is 10 years younger than greg. In 7 years, he will be 10 years more than one halfas old as greg. Find their age at present. help me solve it.

Let Greg be X and Pol be X - 10 as far as current ages.  In 7 years (thats x + 7) he will be 10 years more than 1/2 as old as greg (thats (x - 10 + 10)/2 or x/2).  So set them equal..

X  and x -10

x + 7  and  x - 10 + 7  28  and 25 



(x+7)/2 + 10 = x - 3

x + 17 = 2x - 6  ******** Correction    2 * 10 = 20 + 7 = 27 So it should be

x + 27 = 2x - 6

x =33  ---> Which is Greg's age so Pol's is x-10 or 33 -10 = 23 

So Pol is 23 and Greg is 33

16 comments:

  1. ndi ko parin gets ehh



    hiwap aman nyan

    noh kea yun

    eh ass namin yan

    wewzxz

    help me aman

    ReplyDelete
  2. d q ma gets.. dba ung x="Gregs age"..
    tpos dapat in eq. (x+7)/2 +10 = x-3
    2[(x+7)/2 +10]=[x-3]2
    x+7 +20 = 2x-6
    7+20+6 = 2x-x
    33 = x

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  3. (x+7)/2 + 10 = x - 3

    x + 17 = 2x - 6

    mali to

    ano nangyari sa 10 ganun pa din?

    ReplyDelete
  4. mali solution tama sagot

    ReplyDelete
  5. wrong solution po. solution is confusing. (x+7)/2 + 10 = x-3 must be x+7+20 = 2x-6. therefore x=33, that is greg's present age. ginamit sa given x is equal to greg's age, why pagdating sa answer ung value nakuha sa x naging age na ni pol?

    ReplyDelete
  6. tama naman yun.... cguro better understanding lng sa mga baguhan....

    ReplyDelete
  7. buang ka bhea..bulok

    ReplyDelete
  8. Pol should be 23, and Greg should be 13.
    Pol=x
    Greg=x-10

    x=23

    Pol=23
    Greg=23-10 -> 13

    ReplyDelete
  9. mali solution....x=23 hahahah lol paano naging mas younger c greg kay pol ...dapat dyan x=33 then subsitute 33-10=23.. hayzzz bulok

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  10. Oo nga!! ang hirap nyan! paano naging x =23

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  11. The solution is correct -- just check the problem and the answers. I said Pol is 23 and Greg is 33 .. In the problem it starts out ... "Pol is 10 years younger than greg..." 33 gregs age minus 23 pols age = 10 - So far so good... Now it says, "In 7 years, he will be 10 years more than one halfas old as greg." Ok in 7 years Pol will be 30 and greg will 40. Half of 40 is 20 and Pol is 30 in 7 years which is 10 years more than half of Greg's age of 40. It checks out.

    ReplyDelete
  12. table method.

    present future

    pol x-10 (x-10)+7
    greg x (x+7+10)/2 <- it says 10 and one half older dan pol.

    (x-10)+7 = (x+7+10)/2
    x-3 = (x+17)/2 <- multiply both sides by 2

    2x - 6 = x+17
    2x-x =17+6
    x=23

    therefore the age of greg now is 23 and the present age of pol is 23-10 =11

    this is my solution for that problem. correct me if i'm wrong

    ReplyDelete
  13. its simple. the question is wrong. greg is 23 and paul is 13 so in 7 yrs how would their ages be appropriate for the question.

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  14. Pet -- Using your answers Pol 11 and Greg 23... In 7 years Pol will be 18 and Greg will be 30 right? ok Now whats 1/2 of 30 ? its 15. Sorry 18 is not 10 years more than 15(which is half of what Greg will be in 7 years)

    ReplyDelete


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