Question

(-5upon18+5upon12) to get-11upon72​

Answer 1

Answer:

$\large{\boxed{\sf \frac{21}{72}}}$

Step-by-step explanation:

Let the required number be x.

Now, sum of (-5/12) and (-5/18):  

$\sf \implies \frac{ - 5}{12} + ( \frac{ - 5}{18} ) \\ \\ \sf \implies \frac{ - 15 + ( - 10)}{36} \\ \\ \implies \sf \frac{ - 25}{36}$

According to the question ;

$\implies \sf \frac{ - 25}{36} - x = \frac{ - 71}{72} \\ \\ \implies \sf - x = \frac{ - 71}{72} + \frac{25}{36} \\ \\ \implies \sf - x = \frac{ - 71 + 50}{72} \\ \\ \implies \sf - x = - \frac{ 21}{72} \\ \\ \implies \sf x = \frac{21}{72}$

Hence, the required number is 21/72.