Question

(2,4 x - 36) : 1/5/7 = -14

Answer 1

( 2,4 x - 36) : \(1\dfrac{5}{7}\) = -14

( \(\dfrac{12}{5}\) x - 36) : \(\dfrac{12}{7}\) = -14

( \(\dfrac{12}{5}\) x -36 ) = -14 . \(\dfrac{12}{7}\)

\(\dfrac{12}{5}\) x -36 = -24

\(\dfrac{12}{5}\) x = -24 + 36

\(\dfrac{12}{5}\) x = 12

x = 12 : \(\dfrac{12}{5}\)

x = 5

Answer 2

(2,4x-36):1\(\dfrac{5}{7}\)=-14

(2,4x-36):\(\dfrac{12}{7}=-14\)

2,4x-36=-14.\(\dfrac{12}{7}\)

2,4x-36=-24

2,4x=-24+36

2,4x=12

x=12:2,4

x=5

Answer 3

\(\left(2,4x-36\right)\div\dfrac{7}{5}=-14\)

\(\Rightarrow2,4x-36=-14\times\dfrac{7}{5}\)

\(\Rightarrow2,4x-36=\dfrac{-98}{5}\)

\(\Rightarrow2,4x=\dfrac{-98}{5}+36\)

\(\Rightarrow2,4x=\dfrac{82}{5}\)

\(\Rightarrow x=\dfrac{82}{5}\div2,4\)

\(\Rightarrow x=\dfrac{41}{6}\)

Vậy \(x=\dfrac{41}{6}\)