Question

What should be added to (2/3+3/5) to get -12/15

Answer 1

LET THE UNKOWN NUMBER BE x

ACCORDING TO THE QUESTION,

$(\frac{2}{3} + \frac{3}{5} ) + x = \frac{ - 12}{15} \\ \\ \implies (\frac{10 + 9}{15}) + x = \frac{ - 12}{15} \\ \\ \implies \frac{19}{15} + x = \frac{ - 12}{15} \\ \\ \implies x = \frac{ - 12}{15} - \frac{19}{15} \\ \\ \implies x = \frac{ - 12 - 19}{15} \\ \\ \implies \boxed{x = \frac{ - 31}{15} }$

Therefore, the unknown no. is -31/15.

Answer 2

Step-by-step explanation:

LET THE UNKOWN NUMBER BE x

ACCORDING TO THE QUESTION,

\begin{gathered}(\frac{2}{3} + \frac{3}{5} ) + x = \frac{ - 12}{15} \\ \\ \implies (\frac{10 + 9}{15}) + x = \frac{ - 12}{15} \\ \\ \implies \frac{19}{15} + x = \frac{ - 12}{15} \\ \\ \implies x = \frac{ - 12}{15} - \frac{19}{15} \\ \\ \implies x = \frac{ - 12 - 19}{15} \\ \\ \implies \boxed{x = \frac{ - 31}{15} }\end{gathered}

(

3

2

+

5

3

)+x=

15

−12

⟹(

15

10+9

)+x=

15

−12

⟹

15

19

+x=

15

−12

⟹x=

15

−12

−

15

19

⟹x=

15

−12−19

⟹

x=

15

−31