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25 November, 14:37

X divided by x+3 equals 4 divided by x+5

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  1. 25 November, 15:16
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    x=-4, 3.

    Step-by-step explanation:

    x / (x+3) = 4 / (x+5)

    cross product

    4 (x+3) = x (x+5)

    4x+12=x^2+5x

    x^2+5x-4x-12=0

    x^2+x-12=0

    factor out the trinomial,

    (x+4) (x-3) = 0

    zero property,

    x+4=0, x-3=0,

    x=0-4=-4

    x=0+3=3
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