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

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

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

\(\Rightarrow y:15=825\)

\(\Rightarrow y=12375\)

y : 15 = 28 875 : 35
y : 15 = 825 
      y  = 825 x 15 
      y = 12375 
Kluận...

tính như bth thôi ráng lên bạn nhá

99/32

\(y x 4/9 - 5/8 = 1/2 : 2/3\)

\(y x 4/9 - 5/8 = 3/4\)

\(y x 4/9 = 3/4 + 5/8\)

\(y x 4/9 = 11/8\)

\(y = 11/8 : 4/9\)

\(y = 99/32\)

em viết anh ko hiểu nổi

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

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

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

1/125

1/125

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+23=6y+17

=> 5y=6

=>y=6/5

đúng rồi

y + 23 = 6 x y + 17

=> 5 x y = 6

=> y = 6/5