Question

2\(\dfrac{4}{5}\)x -50 : \(\dfrac{2}{3}\)= 51

Answer 1

\(2\dfrac{4}{5}x-50:\dfrac{2}{3}=51\)

\(\dfrac{14}{5}x-50:\dfrac{2}{3}=51\)

\(\dfrac{14}{5}x-50=51.\dfrac{2}{3}\)

\(\dfrac{14}{5}x-50=34\)

\(\dfrac{14}{5}x=34+50\)

\(\dfrac{14}{5}x=84\)

\(x=84:\dfrac{14}{5}\)

\(x=84.\dfrac{5}{14}\)

\(x=30\)

Answer 2

\(2\dfrac{4}{5}x-50\div\dfrac{2}{3}=51\)

=>\(2\dfrac{4}{5}x-50=51\times\dfrac{2}{3}\)

\(2\dfrac{4}{5}x-50=34\)

=>\(2\dfrac{4}{5}x=34+50\)

\(2\dfrac{4}{5}x=84\)

=>\(x=84\div2\dfrac{4}{5}\)

\(x=30\)

Vậy x=30