Question

[2 4/5 x - 50] : 2/3 =51

Answer 1

=>(2,8x-50):2/3=51

=>2,8x-50=34

=>2,8x=84

=>x=84/2,8=30

Answer 2

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

\(\left(\dfrac{14}{5}x-50\right)=\dfrac{10}{3}\)

\(\dfrac{14}{5}x=\dfrac{160}{3}\)

\(\Rightarrow x=\dfrac{160}{3}:\dfrac{14}{5}\)

\(\Rightarrow x=\dfrac{400}{21}\)

Answer 3

Mình làm nhầm nhé

Answer 4

Lời giải:

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

$2\frac{4}{5}x-50=51.\frac{2}{3}=34$

$2\frac{4}{5}x=50+34=84$

$x=84:2\frac{4}{5}=30$