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waheguru

  • 3 years ago

Can someone pleas ehelp me with this question, i am confused. Its solving porportions and i am doing 8:4:x = 2: y:6 how do i solve this?

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  1. wio
    • 3 years ago
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    It turns out into a system of equations.

  2. wio
    • 3 years ago
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    \[ 8:4:x=c(2:y:6) \\ 8 = 2c \\ 4 = cy\\ x = 6c \\ \]

  3. wio
    • 3 years ago
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    First solve for c, then solve for x and y.

  4. waheguru
    • 3 years ago
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    where does the c come from?

  5. skullpatrol
    • 3 years ago
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    The alphabet.

  6. wio
    • 3 years ago
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    c is there to represent the fact that two proportional things are going to be equal if you multiply one of them by c.

  7. skullpatrol
    • 3 years ago
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    You need to find a c such that the above equation is true.

  8. waheguru
    • 3 years ago
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    I know a/b = c/d and a*d=b*c but this euqstion had 3 terms which is confusing me

  9. skullpatrol
    • 3 years ago
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    Have you solved for c?

  10. waheguru
    • 3 years ago
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    umm.

  11. waheguru
    • 3 years ago
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    im not sure how

  12. wio
    • 3 years ago
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    \[ 8=2c \]

  13. wio
    • 3 years ago
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    \[ \frac{8}{2} = \frac{4}{y} \\ \frac{8}{2} = \frac{x}{6} \]

  14. waheguru
    • 3 years ago
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    but how does 8 = 2c?

  15. skullpatrol
    • 3 years ago
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    $$8=2c$$ $$\frac{1}{2}*8=\frac{1}{2}*2c$$ $$4=(\frac{1}{2}*2)c$$ $$4=1c$$ $$4=c$$

  16. skullpatrol
    • 3 years ago
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    $$ 8:4:x = 2: y:6$$ $$8:4:x = c(2: y:6)$$

  17. skullpatrol
    • 3 years ago
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    |dw:1360205915252:dw|

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