\(2\dfrac{4}{5}x-50:\dfrac{2}{3}=51\)
\(\dfrac{14}{5}x-50:\dfrac{2}{3}=51\)
\(\dfrac{14}{5}x-50=51.\dfrac{2}{3}\)
\(\dfrac{14}{5}x-50=34\)
\(\dfrac{14}{5}x=34+50\)
\(\dfrac{14}{5}x=84\)
\(x=84:\dfrac{14}{5}\)
\(x=84.\dfrac{5}{14}\)
\(x=30\)
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\(2\dfrac{4}{5}x-50\div\dfrac{2}{3}=51\)
=>\(2\dfrac{4}{5}x-50=51\times\dfrac{2}{3}\)
\(2\dfrac{4}{5}x-50=34\)
=>\(2\dfrac{4}{5}x=34+50\)
\(2\dfrac{4}{5}x=84\)
=>\(x=84\div2\dfrac{4}{5}\)
\(x=30\)
Vậy x=30
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