a) y × 33 = 1386

y = 1386 : 33

y = 42

b) 36 × y = 27612

y = 27612 : 36

y = 767

c) y : 50 = 218

y = 218 x 50

y = 10900

a) y × 33 = 1386

y = 1386 : 33

y = 42

b) 36 × y = 27612

y = 27612 : 36

y = 767

c) y : 50 = 218

y = 218 x 50

y = 10900

10900

x = 218 x 50

x = 10900

x=10900

Chọn đáp án C.

a) 10, 8                

b) – 3,5

c)  7 10  

d)  17 5

     (x-y2+z)2018+(y-2)218+(z+3)218=0

  =>     0.2018    +  0.218  +    0.218  =0

  =>  x-y2+z+y-2+z+3 = 0

hay  x-3y+2z+3=0

   y-2=0 => y=2

   z+3=0 => z=-3

Thay vào : x-3y+2z+3=0

      Ta có : x-3.2+2.(-3)+3=0

                  x- 6 +  (-6)   +3 =0

            =>  x-0=0-3

            =>  x=-3  

-210+(-320)-(422-50)+370 = -532

225-(y:8)=218

y:8=225-218

y:8=7

y=7x8

y=56

k cho mk nhé

225 - (y : 8) = 218

         y : 8 = 225 - 218

         y : 8 = 7

         y      = 7 x 8

         y      = 56

Vậy y = 56

225-(y:8)=218

        y:8=225-218

        y:8=7

           y=7*8

           y=56

=> kich ho minh nha neu dung

 đi mà hãy giúp mik, chả lời mik đều tick cho mà

\(y\times36=11772\\ y=11772:36\\ y=327\)

\(3358:y=73\\ y=3358:73\\ y=46\)

a)y x 36=11772
y=11772:36
y=327
b)3358 : y=73
y=3358:73
y=46
c)43 x y - 218=3609
43 x y=3609+218
43 x y=3827
y=3827:43
y=89

17: \(x-\sqrt{x}-2=\left(\sqrt{x}-2\right)\left(\sqrt{x}+1\right)\)

18: \(x-3\sqrt{x}+2=\left(\sqrt{x}-1\right)\left(\sqrt{x}-2\right)\)

19: \(x\sqrt{x}-x+\sqrt{x}-1=\left(\sqrt{x}-1\right)\left(x+1\right)\)

20: \(x\sqrt{x}+y\sqrt{y}+x-y\)

\(=\left(\sqrt{x}+\sqrt{y}\right)\left(x-\sqrt{xy}+y\right)+\left(\sqrt{x}+\sqrt{y}\right)\left(\sqrt{x}-\sqrt{y}\right)\)

\(=\left(\sqrt{x}+\sqrt{y}\right)\left(x-\sqrt{xy}+y+\sqrt{x}-\sqrt{y}\right)\)

\(17,=\left(\sqrt{x}-2\right)\left(\sqrt{x}+1\right)\\ 18,=\left(\sqrt{x}-2\right)\left(\sqrt{x}-1\right)\\ 19,=\left(x+1\right)\left(\sqrt{x}-1\right)\\ 20,=???\)

bn xem lại đề câu 20 nha

tik mik nha