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a. 5x(x-100)=0
=> TH1 : 5x=0 => x= 0
TH2 : x-100 = 0 => x= 100
Vậy .......
b. 34x (2x-6) =0
TH1: 34x=0 => x= 0
TH2; 2x-6=0 => 2x= 6 => x = 3
Vậy ............
a,5x(x-100)=0
=> 5x=0 hoac x-100=0
=> x=0 hoac x=100
b,34x(2x-6)=0
=> 34x=0 hoac 2x-6=0
=>x=0 hoac x=3
c,3x(x+7)-15=27
phan nay nhieu truong hop lam ban dong nao nha goi y
3x=6hoac21
x+7=7hoac 2
va co 4truong hop
phan con lai ko ro ban viet lai di
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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
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Vì |x|=5
=> x=5 hoặc x=-5
Vì |x-5|=4
=>x-5=4 hoặc x-5=-4
x=4+5 x=(-4)+5
Vậyx=9 hoặc x=1
Vì |3x-2|=0
=>3x-2=0(vô lí)
24.|x|-|6|=42
24.x-6=42
24.x=42+6
24.x=48
x=48:24
x=2
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15 - 3 . (-6) - 2x = 4 . (-2) + 3x - 32
<=> 15 + 18 - 2x = -8 + 3x - 9
<=> -2x - 3x = -15 - 18 - 8 - 9
<=> - 5x = -50
<=> x = 10
Vậy ...
b ) - 8 + 30(x+2)-6(x-5)-24 = 10
<=> - 8 + 30x + 60 - 6x + 30 - 24 = 10
<=> 30x - 6x = 8 - 60 - 30 + 24 + 10
<=> 24x = -48
<=> x = - 2
Vậy ...
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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
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a, (2x - 5) + 17 = 6
=> 2x - 5 + 17 = 6
=> 2x = 6 - 17 + 5
=> 2x = -6
=> x = -3
vậy_
a, (2x - 5) + 17 = 6
2x - 5 = 6 - 17
2x - 5 = -11
2x = -11 + 5
2x = -6
x = -6 : 2 = -3
b) -12 + 3.(-x + 7) = -18
3.(-x + 7) = -18 + 12
3.(-x + 7) = -6
-x + 7 = -6:3
-x + 7 = -2
-x = -2 - 7
-x = -9
x = 9
3x-6=24+x
<=>3x-x=24+6
<=>2x=30
<=>x=15