Question

4/7x - x = -9/49

Answer 1

4/7x - x = -9/49

4/7x - x. 1 = -9/49

x . (4/7 - 1) = -9/49

x . (4/7 - 7/7) = -9/49

x . -3/7        = -9/49

x          = -9/49 : -3/7

x          = -9/49 . -7/3

x          = 3/7

    -Chúc bạn học tốt-

Answer 2

\(x=\dfrac{3}{7}\)

Answer 3

Ta có: \(\dfrac{4}{7}x-x=\dfrac{-9}{49}\)

\(\Leftrightarrow\dfrac{-3}{7}x=\dfrac{-9}{49}\)

\(\Leftrightarrow x=\dfrac{-9}{49}:\dfrac{-3}{7}=\dfrac{-9}{49}\cdot\dfrac{7}{-3}=\dfrac{63}{147}=\dfrac{9}{21}\)

Vậy: \(x=\dfrac{9}{21}\)