Question

if(1/4n)+(1/6n)=(x-7)then n==​

Answer 1

$\frac{1}{4n} + \frac{1}{6n} = x - 7 \\ \frac{3 + 2}{12n} = x - 7 \\ \frac{5}{12n} = x - 7 \\ \frac{5}{12n} + 7 = x \\ \frac{5 + 84n}{12n} = \\ 5 + 84n = 12xn$

$</p><p>5 + 84n - 12xn = 0 \\ </p><p>5 + 12n(7 - x) = 0 \\ </p><p>12n(7-x) = -5 \\ 12n = \frac{ - 5}{7 - x} \\ n = \frac{ - 5}{(7 - x) \times 12}$

Hence , n = -5/(7-x)×12

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