Question

\(\frac{-124}{12-4n}\)=31

n=?

Answer 1

\(\Leftrightarrow\frac{31}{n-3}=\frac{31}{1}\Rightarrow31.1=\left(n-3\right)31\)

<=>(n-3)31=31(n-3)

=>31=31(n-3)

<=>31=31n-31.3

=>31=31n-93

=>-31n=-124

=>n=(-124):(-31)

=>n=4

Answer 2

=> 12 - 4n = ( -124 ) : 31 = -4

4n = 12 - ( -4 ) = 16

n = 16 : 4 = 4

Answer 3

31(12-4n)=-124

372-124n=-124

124n=372+124

124n=496

=>n=4

Answer 4

=> 12 - 4n = ( -124 ) : 31 = -4

4n = 12 - ( -4 ) = 16

n = 16 : 4 = 4