Question

How to add the rational expression 12/7d -3/14d

Answer 1

`(3)/(2d)`

Explanation

our given expression is =
`(12)/(7d)-(3)/(14d)`

In order to simplify first of lets make the denominator of both the fractions same by multiplying and dividing with some number.

Lets multiply and divide our first fraction by 2 in order to make denominator of both the fractions same.

=
`(2)/(2)(12)/(7d)-(3)/(14d)`

=
`(24)/(14d)-(3)/(14d)`

Now taking LCM of both fractions

=
`(24-3)/(14d)`

Simplifying further

=
`(21)/(14d) = (3)/(2d)`

So out correct answer is
`(3)/(2d)`