Question

If 1/a - 1/b = 1/c + 1/d find the value of a when b= 4/3, c =1/3 and d=3/4.​

Answer 1

$\frac{1}{a} - \frac{1}{b} = \frac{1}{c} - \frac{1}{d} \\ or. \: \frac{1}{a} = \frac{1}{c} - \frac{1}{d} + \frac{1}{b} \\ or. \frac{1}{a} = \frac{bd - bc + dc}{bcd} \\ or. bcd = abd -abc+adc \\ or. \: abd - abc + adc - bcd = 0$