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Sonny substituted 5 for x in the proportion 16/x = 48/12 and cross multiplied to get 240 = 240. Why is this?

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  1. 2 May, 13:45
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    16 / 5 = 48 / 12

    16 * 12 = 5 * 48

    192 = 240

    which is incorrect so 5 cannot be the solution of the equation.

    substituting 4 for x will give you 192=192
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