Question

 Tìm x

X × 45 + x × 55 = 1000

6/x + 1/2 = 2

Answer 1

x . 45 + x . 55 = 1000

x . ( 45 + 55 ) = 1000

x . 100 = 1000

x = 1000 : 100

x = 10

Vậy x = 10

6 / x + 1 / 2 = 2

6 / x = 2 - 1 / 2

6 / x = 3 / 2

6 / x = 6 / 4 

=> x = 4

Vậy x = 4

Answer 2

1. x = 10

2. x = 2

...

Answer 3

x . 45 + x . 55 = 1000

x . ( 45 + 55 ) = 1000

x . 100 = 1000

x = 1000 : 100

x = 10

..............................................

Answer 4

\(x\times45+x\times55=100\)

   \(x\times\left(45+55\right)=100\)

                  \(x\times100=100\)

                                 \(x=100:100\)

                                  \(x=1\)

\(\frac{6}{x}+\frac{1}{2}=2\)

              \(\frac{6}{x}=2-\frac{1}{2}\)

            \(\frac{6}{x}=\frac{3}{2}\) 

              \(\frac{6}{x}=\frac{6}{4}\)

=> x = 4

Answer 5

X x 45 + X x 55 = 1000

X x (45 + 55) = 1000

X x 100 = 1000

X           = 1000 : 100

X           = 10

6/x + 1/2 = 2

6/x          = 2 - 1/2

6/x          = 4/2 - 1/2

6/x          = 3/2

=> X x 3 = 6 x 2

     X x 3 = 12

     X       = 12 : 3

     X       = 4

Answer 6

a)  x x 45 + x x 55 = 1000

    x x ( 45 + 55 )    = 1000

    x x 100              = 1000

    x                        = 1000 : 100

   x                          = 10

b) 6/x + 1/2 = 2 

    6/x           = 2 - 1/2

    6/x           = 3/2

    6/x           = 6/4

=> x             = 4

Answer 7

trả lời

X x 45+X x 55=1000

X(45+55)=1000

X x100=1000

X=10

hok tốt

Answer 8

\(x\times45+x\times55=1000\)

\(x\times\left(45+55\right)=1000\)

\(x\times100=1000\)

\(\Rightarrow x=1000:100\)

\(x=10\)

Answer 9

\(\frac{6}{x}+\frac{1}{2}=2\)

\(\frac{6}{x}=2-\frac{1}{2}\)

\(\frac{6}{x}=\frac{3}{2}\)

\(x=\frac{6\times2}{3}\)

\(\Rightarrow x=4\)

Answer 10

a)  \(x.45+x.55=1000\)

\(x.\left(45+55\right)=1000\)

\(x.100=1000\)

\(x=\frac{1000}{100}=10\)

Vậy x= 10

b ) \(\frac{6}{x}+\frac{1}{2}=2\)

\(\frac{6}{x}=2-\frac{1}{2}=\frac{1}{2}\)

\(x=6:\frac{1}{2}=3\)

Vậy x=3

Answer 11

\(x\times45+x\times55=1000\)

\(\Rightarrow x\times\left(45+55\right)=1000\)

\(\Rightarrow x\times100=1000\)

\(\Rightarrow x=1000:100\Rightarrow x=10\)

~ Hok tốt ~

Answer 12

\(\frac{6}{x}+\frac{1}{2}=2\)

\(\Rightarrow\frac{6}{x}=2-\frac{1}{2}\)

\(\Rightarrow\frac{6}{x}=\frac{3}{2}\)

\(\Rightarrow6\times2=3\times x\)

\(\Rightarrow12=3\times x\)

\(\Rightarrow x=12:3\)

\(\Rightarrow x=4\)

~ Hok tốt ~

Answer 13

x . 45 + x . 55 = 1000

x . ( 45 + 55 ) = 1000

x . 100 = 1000

x = 1000 : 100

x = 10

Vậy x=10

Answer 14

X x 45 + X  x  55 = 1000

X x ( 45 + 55) = 1000

X x 100 = 1000

X = 1000 : 100

X = 10

~ Học tốt ~