Answer:
[tex]\frac{3}{2d}[/tex]
Step-by-step explanation
our given expression is = [tex]\frac{12}{7d}-\frac{3}{14d}[/tex]
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.
= [tex]\frac{2}{2}\frac{12}{7d}-\frac{3}{14d}[/tex]
=[tex]\frac{24}{14d}-\frac{3}{14d}[/tex]
Now taking LCM of both fractions
= [tex]\frac{24-3}{14d}[/tex]
Simplifying further
=[tex]\frac{21}{14d} = \frac{3}{2d}[/tex]
So out correct answer is [tex]\frac{3}{2d}[/tex]