Question

a, 4/7 . x + 2/3 = -1/5

b, 2/9 - 7/8 . x = 1

Answer 1

\(a.\dfrac{4}{7}.x+\dfrac{2}{3}=\dfrac{-1}{5}\)

\(\dfrac{4}{7}.x=\dfrac{-1}{5}-\dfrac{2}{3}\)

\(\dfrac{4}{7}.x=\dfrac{-3}{15}-\dfrac{10}{15}\)

\(\dfrac{4}{7}.x=\dfrac{-13}{15}\)

\(x=\dfrac{-13}{15}:\dfrac{4}{7}\)

\(x=\dfrac{-13}{15}.\dfrac{7}{4}=\dfrac{-91}{60}\)

\(b,\dfrac{2}{9}-\dfrac{7}{8}.x=1\)

\(\dfrac{7}{8}.x=\dfrac{2}{9}-1=\dfrac{-7}{9}\)

\(x=\dfrac{-7}{9}:\dfrac{7}{8}\)

\(x=\dfrac{-7}{9}.\dfrac{8}{7}\)

\(x=\dfrac{-8}{9}\)