a) 10 - x : 2 = 1

x: 2 = 9

x = 18

b) x:4 + 3 x 2 = 7

x:4 + 6 = 7

x:4 = 1

x = 4

c) 2: x + 5 = 6

2: x = 1

x = 2

+4.10-x:2=1

40-x:2=1

     x:2=40-1

     x:2=39

    x:2=19,5

+5.x:4+3*2=7

5.x:4+6=7

5.x:4=7-6=1

5.x=1.4=4

x=4:5

x=0,8

+6.2:x+5=6

12:x=6-5

12:x=1

x=12:1

x=12

+7.2*x*3*5=30

14.x.15=30

14.x=2

x=2:14

x=1/7

+8.2*x:10*2=1

16.x:20=1

16.x=20

x=20:16

x=1,25

9.18:x-5*2=8

10.5*5-2:x=24

d) 2 * x * 3 * 5 = 30

x * 30 = 30

x = 1

e) 2 * x : 10* 2 = 1

2*x * 1/10 * 2 = 1

2/5 * x = 1

x = 5/2

g) 18 : x - 5*2 = 8

18 : x - 10 = 8

18 : x = 18

x = 1

h) 5*5 -2 : x = 24

25 - 2:x = 24

2:x = 1

x = 2

1.Ta có:

           Ư(10)={1;2;5;10}.

           Ư(20)={1;2;4;5;10;20}.

=>       Ư(10;20)={1;2;5;10}

Cái dấu ^ là gì rồi tôi giải tiếp cho

dấu ^ là dấu mũ trong lũy thừa

`#` `\text{dkhanhqlv}`

`4)`

`a)3.(-5/11)`

`=-15/11`

`b)3/5+4/7 . 14/6`

`=3/5 + 4/3`

`=9/15+20/15`

`=29/15`

`c) 10/21-3/8 . 4/15`

`=10/21-1/10`

`=100/210-21/210`

`=79/100`

`d)(2/3+3/4)(5/7+5/14)`

`=(8/12+9/12)(10/14+5/14)`

`=17/12 . 15/14`

`=85/56`

`5)`

`a)x-1/2=3/10 . 5/6`

`=>x-1/2=1/4`

`=>x=1/4+1/2`

`=>x=1/4+2/4`

`=>x=3/4`

`b)x/5 = -3/14`

`=>x : 5 = -3/14`

`=>x=-3/14 . 5`

`=>x=-15/14`

`c)x+2/3=9/15 . 5/27`

`=>x+2/3=1/9`

`=>x=1/9-2/3`

`=>x=1/9-6/9`

`=>x=-5/9`

x - 4,68 = 10,5

x          = 10,5 + 4,68

x          = 15,18

x-4,68=10,5

x=10,5+4,68

x+15,18

x-4.68=10.5

x-272=50

x=50+272

x=322

\(=\dfrac{5^{10}\cdot3^{20}\cdot5^{20}}{\left(3\cdot5^2\right)^{15}}=\dfrac{5^{30}\cdot3^{20}}{5^{30}\cdot3^{15}}=3^5=243\)

y x 11 - y = 10.5

y x ( 11 - 1 ) = 10.5

y x 10 = 10.5

y = 10.5 : 10

y = 1.05

Bn ơi, đầu bài là 10,5 hay 10x5 thế

10,5 nha bn

ai tích mình mình tích lại cho

\(4) 10-x:2=1 \)

    \(=> x:2=10-1\)

    \(=> x:2=9\)

    \(=> x=9.2\)

    \(=> x=18\). Vậy \(x=18\)

\(5) x:4+3.2=7\)

\(=> x:4+6=7\)

\(=> x:4=7-6\)

\(=> x:4=1\)

\(=> x=4\). Vậy \(x=4\)

\(6) 2:x+5=6\)

\(=> 2:x=6-5\)

\(=> 2:x=1\)

\(=> x=2\).Vậy \(x=2\)

\(7) 2.x.3.5=30\)

\(=> 2x.15=30\)

\(=>2x=30:15\)

\(=> 2x=2\)

\(=> x=1\).Vậy \(x=1\)

\(8)2.x:10.2=1\)

\(=> 2x=1:2.10\)

\(=> 2x=5\)

 \(=>x=5:2\)

\(=> x=\frac{5}{2}\).Vậy \(x=\frac{5}{2}\)

\(9)18:x-5.2=8\)

\(=> 18:x-10=8\)

\(=>18:x=8+10\)

\(=>18:x=18\)

\(=> x=1\).Vậy \(x=1\)

\(10)5.5-2:x=24\)

\(=>25-2:x=24\)

\(=> 2:x=25-24\)

\(=>2:x=1\)

\(=>x=2\).Vậy \(x=2\)

\(10\cdot5+10\cdot5+10\cdot3=10\cdot\left(5+5+3\right)=10\cdot13=130\)

10.5+10.5+10.3

=10. (5+5+3)

=10.13

= 130

k mình nha mình đầu tiên nè

10 . 5 + 10 . 5 + 10 . 3 

= 10 . ( 5 + 5 + 3 )

= 10 . 13

= 130

Lời giải:

{ } = lỗi sai

a) For i:={1.5 to 10.5} do writeln('A');

Sửa : for i:= 1 to 10 do writeln('A');

b) X:=10; while {X:=10} do X:=X+5;

Sửa : x:=10; while x=10 do x:=x+5;