2.x+13=35 (tìm x)x_x
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(x-42) - 17 = 127
=> x - 42 = 127 + 17 = 144
=> x = 144 + 42 = 186
23(x+1) = 69
=> x + 1 = 69 : 23 = 3
x = 3 - 1 = 2
2x + 5 = 120 : 2 = 60
=> 2x = 60 - 5 = 55
x = 55 : 2 = 27,5
5x - 2 = 613
=> 5x = 613 + 2 = 615
x = 615 : 5 = 123
a)(x-42)-17=127
(x-42)=127+17
(x-42)=144
x=144+42
x=186
b)23(x+1)=69
(x+1)=69:23
(x+1)=3
x=3-1
x=2
c)2.x+5=120:2
2.x+5=60
2.x=60-5
2.x=55
x=55:2
x=27,5
d)5.x-2=613
5.x=613+2
5.x=615
x=615:5
x=123
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18x-18=0
18x=0+18
18x=18
x=18:18
x=1
17(x-15)=0
(x-15)=0:17
(x-15)=0
x=15+0
x=15
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58 - ( x + 34 ) = 15
x + 34 = 58 - 15 = 43
x = 43 - 34 = 9
18 + 24x = 50
24x = 50 - 18 = 32
x = 32 : 24
x = 4/3
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(15 + x) - 24 = 246
=> 15 + x = 246 + 24 = 270
x = 270 - 15 = 255
(298 - x) - 42 = 252
=> (298 - x) = 252 + 42 = 294
=> x = 298 - 2984 = 4
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x - 35 % = 13/2
x - 7/25 = 13/2
x=13/2+7/25
x=339/50
vậy x=339/50
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\(x\) + 78 x \(x\)+ 25 x \(x\)- \(x\)x 4 = 78,6 + 121,4
\(x\)x 1 + 78 x \(x\)+ 25 x \(x\)- \(x\)x 4 = 200
\(x\)x ( 1 + 78 + 25 - 4 ) = 200
\(x\)x 100 = 200
\(x\)= 200 : 100
\(x\)= 2
X + 78 * X + 25 * X - X * 4 = 78,6 + 121,4
X * ( 1 + 78 + 25 - 4 ) = 200
X * 100 = 200
X = 200 : 100
X = 2
Vậy X = 2
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a: =>25-4x=1
=>4x=24
hay x=6
b: =>2x-4=0
hay x=2
c: =>x-35=115
hay x=150
d: =>x-2=12
hay x=14
e: =>x-36=216
hay x=252
2x + 13 = 35
=> 2x = 35 - 13
2x = 22
x = 22 : 2
x = 11