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Hán Quang Dũng
30/08/2018 at 06:33
Votes Answers Follow

Find x:

\(\left(20x-10\right).8.\left(15x+2\right)=10\)

  • ...
    Huỳnh Anh Phương 30/08/2018 at 13:47

    If :

    \(\left(20x-10\right).8.\left(15x+2\right)=0\)

    => 20.x - 10  = 0 or 15.x + 2 = 0 

    * 20 .x -10 = 0                                * 15 . x + 2 = 0

       20 . x      =  0 + 10                           15 .x        = 0 - 2  

       20 . x       = 10                                  15 .x        = - 2 

              x       = 10 : 20                                 x         = - 2 : 15

               x      =  \(\dfrac{1}{2}\)                                        x         = \(\dfrac{-2}{15}\)

    So : x =  \(\dfrac{1}{2}\)   ; x =  \(\dfrac{-2}{15}\)

  • ...
    Hán Quang Dũng 30/08/2018 at 06:40

    I am sorry

    Question exactly:

    Find x \(\left(20x-10\right).8.\left(15x+2\right)=0\)

  • ...
    # ¤ PUBG ¤ # 18/01/2019 at 09:51

    If :

    (20x−10).8.(15x+2)=0

    => 20.x - 10  = 0 or 15.x + 2 = 0 

    * 20 .x -10 = 0                                * 15 . x + 2 = 0

       20 . x      =  0 + 10                           15 .x        = 0 - 2  

       20 . x       = 10                                  15 .x        = - 2 

              x       = 10 : 20                                 x         = - 2 : 15

               x      =  12

                                            x         = −215

    So : x =  12

       ; x =  −215


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Hán Quang Dũng
30/08/2018 at 06:21
Votes Answers Follow

Find x:

12x + 23 - 76 - 2x3 = 8


...
Hán Quang Dũng
30/08/2018 at 06:20
Votes Answers Follow

Find x:

(23x + 8) . (10x - 5) - 10 = 7


...
Huỳnh Anh Phương
29/08/2018 at 10:52
Votes Answers Follow

Give that \(A=x+2x+3x+4x+...\)

a) Shortern A ?

b) Find \(x\) for \(A=x+2x+3x+...=x\)?


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Vanessa Smith
29/08/2018 at 09:49
Votes Answers Follow

How many numbers between 10 to 3000 are multiple 7? Please help me!khocroi


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Huỳnh Anh Phương
29/08/2018 at 02:30
Votes Answers Follow

Give that : \(3x+y=\overline{yx}\); calculate \(x+y\)

Find x
  • ...
    Lê Anh Duy 01/09/2018 at 16:04

    3x + y = 10y + x

    => 2x = 9y 

    => y = 2; x = 9 => x + y = 11

    Huỳnh Anh Phương selected this answer.

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Huỳnh Anh Phương
29/08/2018 at 01:34
Votes Answers Follow

Inside the marble bag, there are 10 marbles. 4 of them are blue marbles. If Kate picks out 1 marble without looking, what is the probalility after he picks out the marble ? Express your answer as a common fraction.

Fraction

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Huỳnh Anh Phương
28/08/2018 at 05:22
Votes Answers Follow

Joe has 15 marbles. 2 of them are blue marbles, 4 of them are purple marbles. What fraction show that the number of red marble ?

Fraction
  • ...
    Nguyễn Mạnh Hùng 28/08/2018 at 07:49

    The number of red marbles is: 15-2-4 = 7(marbles)
    The quotion of the red marble is: 7/15

    Huỳnh Anh Phương selected this answer.

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Huỳnh Anh Phương
28/08/2018 at 01:54
Votes Answers Follow

Jason has $8. He going the bookstore to buy 2 books. If each book cost 1 dollar; 2 quarters; 3 dimes; 2 nickel; 4 cents, how much money he has left ?

double counting

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Huỳnh Anh Phương
27/08/2018 at 02:17
Votes Answers Follow

List the middle point:

A B C D O E H I G

Geometry
  • ...
    Nguyễn Mạnh Hùng 28/08/2018 at 07:52

    We have 3 straight points: (A;E;B);(B;G;C);(C;D;H);(A;I;D);(A;O;C);(I;O;G);(D;O;B);(E;O;H). So the middle point is: E;G;H;I;O

    Huỳnh Anh Phương selected this answer.

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