Question

How do you solve `\frac { 3} { 7} + \frac { 2} { 3} = \frac { 1} { x }`?

Answer 1

`21/23`

Explanation:

`3/7 + 2/3 = 1/x`

`(3/7 × 3/3) + (2/3 × 7/7) = 1/x`

`9/21 + 14/21 = 1/x`

`(9 + 14)/21 = 1/x`

`23/21 = 1/x`

`x = 21/23`