\(y.\left(20+16\right)=972\Leftrightarrow36y=972\Leftrightarrow y=27\)

y x (20+ 16) = 972 

y  x 36 = 972

y = 972 : 36

y = 27

=>10y=26,68

hay y=2,668

\(\Rightarrow y\times\left(3,2+6,8\right)=26,68\\ \Rightarrow y\times10=26,68\\ \Rightarrow y=26,68:10\\ \Rightarrow y=2,668\)

\(y=12-\left(\dfrac{1}{3}\times4\right)=12-\dfrac{4}{3}=\dfrac{32}{3}\)

\(y=\left(\dfrac{12}{35}\times\dfrac{14}{9}\right)-\dfrac{2}{5}=\dfrac{8}{15}-\dfrac{2}{5}=\dfrac{2}{15}\)

a) \(y+\dfrac{1}{3}\times4=12\)

\(y+\dfrac{1}{3}=12:4\)

\(y+\dfrac{1}{3}=3\)

\(y=3-\dfrac{1}{3}\)

\(y=\dfrac{8}{3}\)

b) \(\dfrac{2}{5}+y=\dfrac{12}{35}\times\dfrac{14}{9}\)

    \(\dfrac{2}{5}+y=\dfrac{8}{15}\)

           \(y=\dfrac{8}{15}-\dfrac{2}{5}\)

          \(y=\dfrac{2}{15}\)

2/15

\(y-36=y\div y+1\)

\(y-36=1+1\)

\(y-36=2\)

            \(y=2+36\)

            \(y=38\)

Vậy \(y=38\)

\(y-36=y:y+1\)    

\(y-36=1+1\)    

\(y-36=2\)   

\(y=2+36\)   

\(y=38\)

Y x 100 = 388600

Y = 3886

y×100=388600

y=388600÷100

y=3886

Y x 100 = 388 600

Y           = 388 600 ：100

Y           = 3886

\(y\times7=5,6\%\)

\(\Leftrightarrow y\times7=\dfrac{5,6}{100}\)

\(\Leftrightarrow y=\dfrac{5,6}{100}:7=\dfrac{1}{125}\)

1/125

1/125

em viết anh ko hiểu nổi

\(y=\dfrac{23}{15}\)

23/15

y=1/3+6/5

y=5/15+18/15

y=23/15