Question 1124011
{{{64/(23+c)=28/(23-c)}}}

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{{{16/(23+c)=7/(23-c)}}}


{{{16(23-c)=7(23+c)}}}


{{{16*23-16c=7*23+7c}}}


{{{(16-7)23=(7+16)c}}}


{{{9*23=23c}}}


{{{c=9}}}