Question

What number should be added to ( 7/8+4/5 ) to get (-7)/15 ?

Answer 1

The value of x is $\dfrac{- 257}{120}$.

Step-by-step explanation:

Let x number should be added.

∴ $\dfrac{7}{8} + \dfrac{4}{5}  + x = - \dfrac{7}{15}$

⇒ $\dfrac{35 + 32}{40} + x = - \dfrac{7}{15}$

⇒ $\dfrac{67}{40} + x = - \dfrac{7}{15}$

⇒ x = $- \dfrac{7}{15} - \dfrac{67}{40}$

⇒ x = $\dfrac{- 56 - 201}{120}$

⇒ x = $\dfrac{- 257}{120}$

Hence, the value of x is$\dfrac{- 257}{120}$.