Question

Question 35
$(213\times 657{)}^{-1}=(213{)}^{-1}\times$ ___.

Answer 1

$\frac{1}{657}$ or ${657}^{-1}$
Suppose, $(213\times 657{)}^{-1}=(213{)}^{-1}\times x$
$\Rightarrow \frac{1}{213\times 657}=\frac{1}{213}\times x\Rightarrow x=\frac{213}{213\times 657}\Rightarrow x=\frac{1}{657}or{657}^{-1}$