Kamal is 17 years older than Gina. Gina is 3 years younger than Rachelle. If the sum of their ages is 77, how old is Gina?

How do I solve this?

10 Answers

Relevance
  • 1 year ago
    Favourite answer

    Equations, that's one way.

    K = G + 17

    G = R - 3, or R = G+3

    K + G + R = 77

    Plug in the expressions for K and R

    (G +17) + G + (G+3) = 77

    Same as 3G + 20 = 77, can you solve that?

  • Anonymous
    1 year ago

    Too old for me. I hear 77 I think purrruuuunnnnneeee!

  • 1 year ago

    Gina is 19

    R=22

    K=36

  • David
    Lv 7
    1 year ago

    Their ages respectively are: (17+x-3) + (x-3) + (x) = 77

    Solving the equation x = 22 and so the age of Gina is 19 years.

  • What do you think of the answers? You can sign in to give your opinion on the answer.
  • Anonymous
    1 year ago

    Kamal is 17 years older than Gina.

    K = G + 17

    Gina is 3 years younger than Rachelle.

    R = G + 3

    If the sum of their ages is 77

    K + G + R = 77

    but K = G + 17 and R = G + 3.

    Substitute

    G + 17 + G + G + 3 = 77

    3G + 20 = 77

    3G = 57

    G = 19

    Gina is 19 years old.

  • Como
    Lv 7
    1 year ago

    --

    Let Rochelle be x years

    Gina is x - 3 years

    Kenwood is x + 14 years

    3x + 11 = 77

    3x = 66

    x = 22

    Gina 19 years

  • Mike G
    Lv 7
    1 year ago

    K = G+17

    R = G+3

    G+K+R = 77

    3G+20 = 77

    G = 19

    Gina is 19 years old

  • Dixon
    Lv 7
    1 year ago

    Kamal is 17 years older than Gina. Gina is 3 years younger than Rachelle. If the sum of their ages is 77, how old is Gina?

    K = 17 + G

    G = R - 3

    K + G + R = 77 . . . . . iii

    Substituting in iii

    (17 + G) + G + (G + 3) = 77

  • Anonymous
    1 year ago

    Gina + 3 = Rachelle

    Gina + 17 = Kamal

    Gina + 0 = Gina

    ===============

    3 Gina + 20 = 77, so Gina = (77-20)/3 = 19

  • 1 year ago

    The real problem is that they are all women! If they were men, you could just ASK them how old they are!

    Let's take Rachelle's age. Let's call it r.

    Gina's age is r-3

    Kamal is r - 3 + 17 or r + 14

    So the total of all their ages is

    r + r - 3 + r + 14 = 77

    (The nice thing is this is all addition and subtraction so we don't need parentheses anywhere!)

    So that's 3r - 3 + 14 = 77

    So 3r + 11 = 77

    So 3r = 66

    r = 33 That's Rachelle's age, 33 years

    Gina is 3 years younger than Rachelle, so she is 30.

Still have questions? Get answers by asking now.