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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
a <=>12x-4^3=32
<=>12x=96
<=>x=8
b, <=>3x-6=27
<=>3x=33
<=>x=11
c, <=>119-(x-6)=102
<=>x-6=17
<=>x=23
hok tot
a) ( 12x - 43 ) . 83 = 4.84
=> ( 12x - 43 ) : 4 = 84 : 83
=> ( 12x - 43 ) : 4 = 8
=> 12x - 43 = 8 . 4
=> 12x - 64 = 32
=> 12x = 96
=> x = 8
b) ( 3x - 6 ) . 3 = 34
=> ( 3x - 6 ) = 34 : 31
=> 3x - 6 = 33
=> 3x - 6 = 27
=> 3x = 33
=> x = 11
c) 2448 : [ 119 - ( x - 6 ) ] = 24
=> 119 - ( x - 6 ) = 102
=> x - 6 = 7
=> x = 13
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
\(2448:\left[119-\left(x-6\right)\right]=24\)
\(119-\left(x-6\right)=2448:24\)
\(119-x+6=102\)
\(125-x=102\)
\(x=125-102\)
\(x=23\)
a) 8,2x + 1,8x = 0,3
x(8,2 + 1,8) = 0,3
10x = 0,3
x = 0,3 : 10
x = 0,03
b) 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, 8,2.x+1,8.x = 0,3
x.(8,2+1,8) = 0,3
x.10 = 0,3
x = 0,3:10
x = 3/100
b, 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
\(2448:\left[119.\left(x-6\right)\right]=24\)
\(119.\left(x-6\right)=2448:24=102\)
\(x-6=102:119\)
=> sai de
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