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sws._.

  • 3 years ago

Christopher is 4 times as old as Michael. Ten years ago, Christopher was 9 times as old as Michael.How old is Christopher now?

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  1. sauravshakya
    • 3 years ago
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    Let the present age of Christopher and Michael be x and y then, x=4y ........i x-10 = 9(y-10) .....ii

  2. sauravshakya
    • 3 years ago
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    Solve that two equations

  3. sws._.
    • 3 years ago
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    for x in the second equation do I put 4y? so the equation would look like 4y-10=9(y-10) ?

  4. sauravshakya
    • 3 years ago
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    Yep....... Now solve for y

  5. sws._.
    • 3 years ago
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    okay

  6. sauravshakya
    • 3 years ago
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    Then plug the value of y u get in eqn i to find x

  7. sws._.
    • 3 years ago
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    when i was solving the equation with the y i distributed and got 4y-10=9y-90

  8. sws._.
    • 3 years ago
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    then after that i added 9y to 4y

  9. sws._.
    • 3 years ago
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    and got 13y

  10. sauravshakya
    • 3 years ago
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    4y-10=9y-90 -10+90=9y-4y

  11. sauravshakya
    • 3 years ago
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    got your mistake?

  12. sws._.
    • 3 years ago
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    ohhh

  13. sws._.
    • 3 years ago
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    yes i did

  14. sauravshakya
    • 3 years ago
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    So, what is the value of y

  15. sws._.
    • 3 years ago
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    16?

  16. sauravshakya
    • 3 years ago
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    YES

  17. sauravshakya
    • 3 years ago
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    Now what is the value of x then

  18. sws._.
    • 3 years ago
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    64?

  19. sauravshakya
    • 3 years ago
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    Very correct

  20. sws._.
    • 3 years ago
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    okay :) thank you

  21. sauravshakya
    • 3 years ago
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    WELCOME

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