Question

1/2 = 1/a + b/c make b the subject​

Answer 1

b =
`(ac-2c)/(2a)`

Explanation:

Given

`(1)/(2)` =
`(1)/(a)` +
`(b)/(c)`

Multiply through by 2ac to clear the fractions

ac = 2c + 2ab ( subtract 2c from both sides )

ac- 2c = 2ab ( divide both sides by 2a )

`(ac-2c)/(2a)` = b