a) ( 6400 + 2600) - 3x = 1200
b( 4x - [( 8000 - 3567 ) - ( 2031 - 1598 ) ] = 400
c) 2448 : [( 119 - ( x-6)]= 24
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f ) [ ( 6x - 39 ) : 7 ] . 4 = 12
( 6x - 39 ) : 7 = 12 : 4
( 6x - 39 ) : 7 = 3
6x - 39 = 3 . 7
6x - 39 = 21
6x = 21 + 39
6x = 60
x = 60 : 6
x = 10
g ) 4x - [ ( 8000 - 3567 ) - ( 2031 - 1598 ) ] = 400
4x - [ 4433 - 433 ] = 400
4x - 4000 = 400
4x = 400 + 4000
4x = 4400
x = 4400 : 4
x = 1100
h ) 2448 : [ 119 - ( x - 6 ) ] = 24
119 - ( x - 6 ) = 2448 : 24
119 - ( x - 6 ) = 102
x - 6 = 119 - 102
x - 6 = 17
x = 17 + 6
x = 23
[ (6x-39):7].4=12
[ (6x-39):7]=12:4
[ (6x-39):7]=3
6x-39=3.7
6x-39=21
6x=21+39
6x=60
4x-(4233-433)=400
4x-3800=400
4x=400+3800
4x=4200
x=4200:4
x=1050
123-5.(x+4)=38
5.(x+4)=123-38
5.(x+4)=85
x+4=85:5
x+4=17
x=17-4
x=13
(3.x-2^4).7^3=2.7^4
(3.x-16).343=2.2401
(3.x-16).343=4802
3.x-16=4802:343
3.x-16=14
3.x=14+16
3.x=30
x=30:3
x=10
6^2:4.3+2.5^2
=36:4.3+2.25
=9.3+2.25
=27+50
=77
5.4^2-18:3^2
=5.16-18:9
=80-2
=78
80-(4.5^2-3.2^3)
=80-(4.25-3.8)
=80-(100-24)
=80-76
=4
23.75+25.23+180
=23.(75+25)+180
=23.100+180
=2300+180
=2480
2448:[119-(23-6)]
=2448:(119-17)
=2448:102
=24
(2600+6400)-3.x=1200
9000-3.x=1200
3.x=9000-1200
3.x=7800
x=7800:3
x=2600
[(6.x-72):2-84].28=562
(6.x-72):2-84=562:28
(6.x-72):2-84=281/14
(6.x-72):2=281/14+84
(6.x-72):2=1457/14
6.x-72=1457/14.2
6.x-72=1457/7
6.x=1457/7+72
6.x=1961/7
x=1961/7:6
x=1961/42
a)
=>9x+1=937=>9x=936=>x=104
b)
=>199-(x-6)=24.2448=>-(x-6)=58752-199=>-x+6=58553=>-x=58547=>x=-58547
a)4x : 13 =0
=>4x=0
=>x=0 (đề sai ak lm j có chuyện đề fai lm cái dễ thế này)
b) 2448 : [ 119 - ( x - 6 ) ] = 24
=> 119 - ( x - 6 ) =102
=>x-6=17
=>x=23
c) 7x-7=714
=>7x=721
=>x=103
a) (x+12)-20=0
x+12=20
x=8
b) 5.(x-7)=0
x-7=0
x=7
c) 12x-3x+1=937
12x-3x=936
9x=936
x=104
d) 2448 : [ 119 - ( x - 6 ) ] = 24
119-(x-6) = 102
x-6=17
x=23
a ) ( x + 12 ) - 20 = 0
x + 12 = 0 + 20
x +12 = 20
x = 20 - 12
x = 8
b ) 5 . ( x - 7 ) =0
x - 7 = 0 : 5
x - 7 = 0
x = 0 + 7
x = 7
`2448:[119-(x-6)]=24`
`=>119-(x-6)= 2448 : 24`
`=>119-(x-6)= 102`
`=> x-6=119-102`
`=> x-6=17`
`=>x=17+6`
`=>x=23`
`2448:[119-(x-6)]=24`
`=>119-(x-6)= 2448 : 24`
`=>119-(x-6)= 102`
`=> x-6=119-102`
`=> x-6=17`
`=>x=17+6`
`=>x=23`
a,(6400+2600)-3x=1200
9000-3x=1200
3x=9000-1200
3x=7800
x=7800:3
x=2600
b,(4x-[(8000-3567)-(2031-1598)]=400
(4x-[4433-433]=400
4x-4000=400
4x=400+4000
4x=4400
x=4400:4
x=1100
C;2448:[(119-(x-6)]=24
119-(x-6)=2448:24
119-(x-6)=102
x-6=119-102
x-6=17
x=17+6
x=23
a. (6400+2600) -3x=1200
=> 9000-3x=1200
=> 3x=9000-1200
=> 3x=7800
=> x=7800:3
=> x=2600
b. {4x-[(8000-3567)-(2031-1598)]}=400
=> { 4x-(4433-433)}=400
=> 4x-4000=400
=> 4x=400+4000
=> 4x=4400
=> x=4400:4
=> x=1100
c. 2448:[(119-(x-6)]=24
=> 119-(x-6)=2448:24
=> 119-(x-6)=102
=> x-6=119-102
=> x-6=17
=> x=17+6
=> x=23