Question

find the value of 3/7- 1/4- 5/21​

Answer 1

Answer:

3/7+4/9+(−5/21)+2/3

=3/7+(−5/21)+4/9+2/3

On simplifying, we get,

={9+(−5)}/21+(4+6)/9

=4/21+10/9

Taking L.C.M. we get,

=(12+70)/63

=82/63

=1

63

19

hope it's help you!!!

Answer 2

Answer:

$your \: answer \: will \: be \: \frac{ - 5}{84}$

Step-by-step explanation:

$\frac{3}{7} - \frac{1}{4} - \frac{5}{21}$ LCM of 7 , 4 , 21 = 84

$\frac{(3 \times 12) - (1 \times 21) - (5 \times 4)}{84}$

$\frac{36 - 21 - 20}{84}$

$\frac{15 - 20}{84}$

$\frac{ - 5}{84}$