\(\left(\dfrac{4}{5}:\dfrac{6}{5}+\dfrac{1}{5}:\dfrac{1}{x}\right)\times30-26=54\)

\(\left(\dfrac{4}{5}\times\dfrac{5}{6}+\dfrac{1}{5}\times x\right)\times30=54+26\)

\(\left(\dfrac{4}{6}+\dfrac{1}{5}\times x\right)\times30=80\)

\(\dfrac{4}{6}+\dfrac{1}{5}\times x=\dfrac{8}{3}\)

\(\dfrac{1}{5}\times x=\dfrac{8}{3}-\dfrac{4}{6}\)

\(\dfrac{1}{5}\times x=2\)

\(x=2:\dfrac{1}{5}\)

\(x=2\times5\)

\(x=10\)

`( 4/5 : 6/5 + 1/5 : 1/x ) xx 30 = 26 = 54`

Hai dấu `=` là sao nhỉ ?

\(\Leftrightarrow\)\(\left(\frac{2}{3}+\frac{x}{5}\right)\)\(\times30-26=54\)

\(\Leftrightarrow20+6x\)\(-26=54\)

\(\Leftrightarrow6x=54+26-20\)

\(\Leftrightarrow6x=60\)

\(\Leftrightarrow x=10\)

Học tốt!

\(\left(\frac{4}{5}:\frac{6}{5}+\frac{1}{5}:\frac{1}{x}\right)\cdot30-26=54\)

\(\left(\frac{4}{5}\cdot\frac{5}{6}+\frac{1}{5}\cdot x\right)\cdot30=54+26\)

\(\left(\frac{2}{3}+\frac{x}{5}\right)\cdot30=80\)

\(\frac{2}{3}+\frac{x}{5}=80:30\)

\(\frac{2}{3}+\frac{x}{5}=\frac{8}{3}\)

\(\frac{x}{5}=\frac{8}{3}-\frac{2}{3}\)

\(\frac{x}{5}=2\)

\(x=10\)

\(\left(\frac{4}{5}:\frac{6}{5}+\frac{1}{5}:\frac{1}{x}\right)\cdot30-26=54\)

\(\left(\frac{2}{3}+\frac{x}{5}\right)\cdot30=54\cdot26\)

\(\left(\frac{2}{3}+\frac{x}{5}\right)\cdot30=1404\)

\(\frac{2}{3}+\frac{x}{5}=1404:30\)

\(\frac{2}{3}+\frac{x}{5}=\frac{234}{5}\)

\(\frac{x}{5}=\frac{234}{5}-\frac{2}{3}\)

\(\frac{x}{5}=\frac{692}{15}\)

\(x=\frac{692}{15}\cdot5\)

\(x=\frac{692}{3}\)

\(\left(\frac{4}{5}:\frac{6}{5}+\frac{1}{5}:\frac{1}{x}\right)\times30-26=54\)

\(\Leftrightarrow\left(\frac{4}{5}\times\frac{5}{6}+\frac{1}{5}\times x\right)\times30=80\)

\(\Leftrightarrow\frac{2}{3}+\frac{1}{5}\times x=\frac{8}{3}\)

\(\Leftrightarrow\frac{1}{5}\times x=2\)

\(\Leftrightarrow x=2:\frac{1}{5}\)

\(\Leftrightarrow x=2\times5\)

\(\Leftrightarrow x=10\)

Vậy x = 10. 

Matcha

là sao

sai đề rồi bạn à

(\(\frac45:\frac65\) + \(\frac15\) : \(\frac{1}{x}\)) x 30 - 26 = 54

(\(\frac45\times\frac56\) + \(\frac15\times x\)) x 30 = 54 + 26

(\(\frac23+\frac15x\)) x 30 = 80

\(\frac23+\frac15x\) = 80 : 30

\(\frac23+\frac15x=\frac83\)

\(\frac15x=\frac83-\frac23\)

\(\frac15x\) = 2

\(x=2:\frac15\)

\(x=2\times5\)

\(x=10\)

Vậy \(x=10\)

6,3 x y + 3,7 x y = 100

y x (6,3 + 3,7) = 100

y x 10 = 100

y = 100 : 10

y = 10

Vậy y = 10