Question

5/a-2/b when a= 1/2 , 1/4​

Answer 1

Step-by-step explanation:

3/10 + 7/15

LCM of 10 and 15 = 30

= (3 × 3 + 7 × 2) / 30 = (14 + 9) / 30

= 23/30

Answer 2

$= \frac{5}{a} - \frac{2}{b} \\ \\ = \frac{5}{ \frac{1}{2} } - \frac{2}{ \frac{1}{4} } \\ \\ = \frac{10}{1} - \frac{2}{1} \\ \\ = \frac{10 - 2}{1} \\ \\ = \frac{8}{1} \\ \\ = 8$