Question

Calculati 1/3 - 1/4 =6/n

Answer 1

1/3-1/4=4/12-3/12=1/12=6/n⇒n=12*6 , n=72

Answer 2

$\frac{1}{3} - \frac{1}{4} = \frac{6}{n} \\ \\ \frac{1}{12} = \frac{6}{n} \\ \\ \frac{1}{12}n = 6 \\ \\ \frac{n}{12} = 6 \\ \\ n = 6 \times 12 = 72$