Question

evaluate the following 4/7 + minus 8/9 + minus 13/7 + 17/21

Answer 1

According to given sum,

$= > \: \frac{4}{7} + ( \frac{ - 8}{9} ) + ( \frac{ - 13}{7} ) + \frac{17}{21}$

The LCM of the denominators is 63.

$= > \: \frac{36}{63} - \frac{56}{63} - \frac{117}{63} + \frac{51}{63}$

$= > \frac{36 - 56 - 117 + 51}{63}$

$= > \: \frac{ - 86}{63}$


:-)Hope it helps u.