Question

X - 7 phần 12 = -12 phần 16

Answer 1

\(\dfrac{x-7}{12}=\dfrac{-12}{16}\Rightarrow x-7=\dfrac{-12.12}{16}\)

\(\Rightarrow x-7=9\Rightarrow x=16\)

Answer 2

\(x-\dfrac{7}{12}=-\dfrac{12}{16}\)

\(\Leftrightarrow x=-\dfrac{12}{16}+\dfrac{7}{12}\)

\(\Leftrightarrow x=-\dfrac{36}{48}+\dfrac{28}{48}\)

\(\Leftrightarrow x=-\dfrac{8}{48}\)

\(\Leftrightarrow x=-\dfrac{1}{6}\)

Answer 3

x-\(\dfrac{7}{12}=\dfrac{-12}{16}\)

      x=\(\dfrac{-12}{16}+\dfrac{7}{12}\)

      x=\(\dfrac{-1}{6}\)

Answer 4

\(\dfrac{x-7}{12}\) = \(\dfrac{-12}{16}\)

\(\Rightarrow\) ( x - 7 ) . 16 = ( -12 ) . 12

     ( x - 7) . 16 = -144

               x - 7 = ( -144 ) : 16

               x - 7 = -9

                    x = ( -9 ) + 7

                    x = -2

Vậy x = -2.