Question

(-4)×_____=80 jaldi batao​

Answer 1

Let the unknown number be $x$.

$\longrightarrow{\green{}}$ $( - 4) \times x = 80$

Divide both sides by $-4$.

$\longrightarrow{\green{}}$ $\frac{ (- 4 )\times x}{ - 4} = \frac{80}{( - 4)}$

$\longrightarrow{\green{}}$ $x = - 20$

Therefore, the unknown number is $\boxed{ -20 }$.