Question

what should be added to (2/3+3/5)to get -2/15?with soluction full

Answer 1

Hey!

Here is your answer!
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Let the number be x

According to question :

$(\frac{2}{3} + \frac{3}{5} ) + x = \frac{ - 2}{15} \\ \\ taking \: lcm \\ \\ \frac{10 + 9 + 15x}{15} = \frac{ - 2}{15} \\ \\ 19 + 15x = - 2 \\ \\ 15x = - 2 - 19 \\ \\ 15x = - 21 \\ \\ x = \frac{ - 21}{15} \\ \\ x = \frac{ - 7}{5} \\ \\ so \: \frac{ - 7}{5} should \: be \: added \: to \: ( \frac{2}{3} + \frac{3}{5} ) \: to \: get \: \frac{ - 2}{15}$
Hope it's satisfactory ☺