\(y=\dfrac{11}{25}:\left(\dfrac{1}{3}+\dfrac{2}{5}\right)=\dfrac{11}{25}:\dfrac{11}{15}=\dfrac{15}{25}=\dfrac{3}{5}\)

`y xx 1/3 + y xx 2/5 = 11/15`

`y xx (1/3 + 2/5) = 11/15`

`y xx 11/15 = 11/15`

     `y          = 11/15 : 11/15`

      `y        = 1`

\(y\times\dfrac{1}{3}+y\times\dfrac{2}{5}=\dfrac{11}{15}\)

\(y\times\left(\dfrac{1}{3}+\dfrac{2}{5}\right)=\dfrac{11}{15}\)

\(y\times\dfrac{11}{15}=\dfrac{11}{15}\)

\(y=\dfrac{11}{15}:\dfrac{11}{15}\)

\(y=\dfrac{11}{15}\times\dfrac{15}{11}\)

\(y=1\)

\(y\times1+y\times2+y\times27-\left(99-22\right)=277\)

\(y\times\left(1+2+27\right)-77=277\)

\(y\times30-77=277\)

\(y\times30=277+77\)

\(y\times30=354\)

\(y=\dfrac{354}{30}\)

\(y=\dfrac{59}{5}\)

 y * 1 + y * 2 + y * 3 + y * 4 + y *1 = 825

y * ( 1 + 2 + 3 + 4  + 1) =825

y * 11 = 825

        y = 825 / 11

         y = 75   

720:(yx2+yx3)=2x3

720:(yx2+yx3)=6

(yx2+yx3)=720:6

yx2+yx3=120

yx(2+3)=120

yx5=120

y=120:5

y=24

nhé bạn

MK đầu tiên

nhanh nhất

\(720\div\left(y\times5\right)=6\)

\(\Rightarrow y\times5=120\)

\(\Rightarrow y=24\)

y * (2+3+4+5+6-9)=99

y * 11 =99

y = 99 : 11

y = 9

\(y\times2+y\times3+y\times4+y\times5+y\times6-y\times9=9999\)

\(y\times\left(2+3+4+5+6-9\right)=9999\)

\(y\times11=9999\)

\(y=9999:11\)

\(y=909\)

9999 mà ?

yx2+50+yx3=100

yx(2+3)+50=100

yx5=100-50

yx5=50

y=50:5

y=10

=>10y=450

hay y=45

yx2+yx3+yx4=450

yx(2+3+4)=450

yx9=450

y=450:9

y=50

y=50

a) y x (27 + 30 + 43 ) = 500

y x 100 = 500 

y = 5

b) tương tự: y x 10 = 9600 

y = 960

a)y x 27 + y x 30 + y x 43 = 500

                                     y  = 500 : (27 + 30 +43)

                                     y  = 500 : 100

                                    y = 5

b)y x 2 + y x 3 + y x 5 = 9600

                               y = 9600 : (2 + 3 + 5)

                                y=9600 : 10

                               y = 960