X x 24= 5704 - 832

X x 24 =4872

X = 4872 : 24

X =203

X = 415x45 + 27

X =18702 tick cho mình

Cái câu đầu tiên ý mik thấy cứ sao sao ý

a ] mình thấy bạn hình như ghi sai đề

b ]    x : [ 25 + 417 ] = 138 = x : 442

x = 442 x 138 = 60996

24 x 36 + 18 x 24 + 18 x 45 - 18 x 7 = 18 x 24 x 2 + 18 x 24 + 18 x 45 - 18 x 7 =
18 x ( 48 + 24 + 45 - 7 ) = 18 x 110 = 1980

\(\frac{1}{3}+\frac{1}{9}+\frac{1}{27}+\frac{1}{81}=\frac{27+9+3+1}{81}=\frac{40}{81}\)

\(\frac{3}{5}< x< \frac{4}{5}\)  |  \(x=\frac{31}{50}\)

3,5 < x < 3,6 | x = 3,51

a) \(3\left(2x-5\right)+125=134\)

\(\Leftrightarrow3\left(2x-5\right)=9\)

\(\Leftrightarrow2x-5=3\)

\(\Leftrightarrow2x=8\Leftrightarrow x=4\)

b) \(\left(2x+5\right)+\left(2x+3\right)+\left(2x+1\right)=27\)

\(\Leftrightarrow6x+9=27\)

\(\Leftrightarrow6x=18\Leftrightarrow x=3\)

d) \(27\left(x-27\right)-27=0\)

\(\Leftrightarrow27\left(x-27\right)=27\)

\(\Leftrightarrow x-27=1\Leftrightarrow x=28\)

c đâu

1/x + 1/y = 1/24

=> 

X=120 y=30

-45 x 65 - 45 x 30 - 45 x 3

= -45 x (65 + 30 + 3)

= -45 x 98

= -230

a) -5x (-9) = -11\(\Rightarrow-5\chi=\frac{11}{9}\Rightarrow\chi=\frac{11}{9}:\left(-5\right)\Rightarrow\chi=\frac{11}{9}.\frac{-1}{5}\Rightarrow\chi=\frac{-11}{45}\)b) 25 - (x + 5 ) = -415 - ( 15-415)\(\Rightarrow25-\left(\chi+5\right)=-415-15+415\)

\(\Rightarrow25-\left(\chi+5\right)=\left(-415+415\right)-15\)

\(\Rightarrow25-\left(\chi+5\right)=-15\Rightarrow\chi+5=25+15\)

\(\Rightarrow\chi+5=40\Rightarrow\chi=35\)

HTDT

2:

a: 27(x-45)=0

=>x-45=0

=>x=45

b: (x-47)-115=0

=>x-47=115

=>x=162

d: x-105:21=15

=>x-5=15

=>x=20

1:

a: =35*(34+86)+65*(75+45)

=120*35+120*65

=120*100=12000

b: \(=39\left(53+47\right)-21\left(53+47\right)\)

=18*100=1800

a) mik hok bít , thông cảm....

b) |x-1|=2

=> x-1=2 và x-1=-2

Nếu x-1=2

x=2+1

x=3.

Nếu x-1=-2

x=-2+1

x=-1

Vậy x=1 hoặc x=-1.

c) (35-x)-70=-45

35-x =-45+70

35-x =25

x =35-25

x =10.

d) 27-3(x-1)=18

3(x-1)=27-18

3(x-1)=9

x-1 =9:3

x-1 =3

x =3+1

x =4.

e) |x|=7

Do x\(\in\)Z nên x=7 hoặc x=-7

ko ai muốn kb đâu hehe