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a) (x - 32) = 68
x = 68 + 32
x = 100
b)9 .x+18=274-4
9.x+18=270
9x=270-18
9x=252
x=252:9
x=28
c) 418 - x = 860 - 442
418 - x = 418
x = 0
d) b xem lại câu hỏi nhé
T.I.C.K GIÚP MK NHÉ!
a) 35.(x-10)=35
x-10= 35:35
x-10= 1
x= 1+10
x= 10
b) 21.(32-x) =21
32-x = 21:21
32-x = 1
x= 32-1
x= 31
a) -| - 210 | + 30 > 16 - x
=> -210 + 30 > 16- x
=> -180 > 16 - x
=> x > 196
b) - ( -111 ) + 111 > - x
=> 111 + 111 > -x
=> 222 > -x
=> x > 222
c) -x + 3 ≥ x - 2x + ( -18 )
=> -x + 3 ≥ -x - 18
=> 3 ≥ - 18 (luôn đúng)
d) 274 - 3x ≤ -3x + 12 + x
=> 274 ≤ 12 + x
=> 262 ≤ x
cho mình hỏi CHTT là cái gì vậy, nói đi rồi mình giải bài đó cho
nhưng có điều câu c) và câu d) bạn ghi < rồi > hay = là sao mình ko hiểu
1. \(x-8+32=68\)
\(x-8=68-32\)
\(x-8=36\)
\(x=36+8\)
\(x=44\)
_____
2. \(x+8+32=68\)
\(x+8=68-32\)
\(x+8=36\)
\(x=36-8\)
\(x=28\)
_____
3. \(98-x+34=43\)
\(98-x=43-34\)
\(98-x=9\)
\(x=98-9\)
\(x=89\)
_____
4. \(98+x-34=43\)
\(98+x=43+34\)
\(98+x=77\)
\(x=77-98\)
\(x=-21\)
_____
5. \(x:5:4=800\)
\(x:5=800.4\)
\(x:5=3200\)
\(x=3200.5\)
\(x=16000\)
_____
6. \(18+x=384:8\)
\(18+x=48\)
\(x=48-18\)
\(x=30\)
_____
7. \(\left(84,6-2\times x\right):3,02=5,1\)
\(84,6-2.x=5,1.3,02\)
\(84,6-2.x=15,402\)
\(2.x=84,6-15,402\)
\(2.x=69,198\)
\(x=69,198:2\)
\(x=34,599\)
_____
8. \(x\times5=120:6\)
\(x.5=20\)
\(x=20:5\)
\(x=4\)
_____
9. \(\left(15\times24-x\right):0,25=100:0,25\)
\(\left(15.24-x\right):0,25=400\)
\(15.24-x=400.0,25\)
\(15.24-x=100\)
\(360-x=100\)
\(x=360-100\)
\(x=260\)
1,x-8+32=68
=>x-8=68-32=36
=>x=36+8=42
2,x+8+32=68
=>x+8=68-32=36
=>x=36-8=28
3,98-x+34=43
=>98-x=43-34=9
=>x=98-9=89
4,98+x-34=43
=>98+x=43+34=77
=>x=77-98=-21
5,x:5:4=800
=>x:20=800
=>x=800x20=16000
6,18+x=384:8=48
=>x=48-18=30
7,(84,6-2x):3,02=5,1
=>84,6-2x=5,1x3,02=15,402
=>2x=84,6-15,402=69,198
=>x=69,198:2=34,599
8,5x=120:6=20
=>x=20:5=4
9,(15x24-x):0,25=100:0,25=400
=>360-x=400x0,25=100
=>x=360-100=260.
a) \(\Rightarrow5\left(x-10\right)=10\)
\(\Rightarrow x-10=2\Rightarrow x=12\)
b) \(\Rightarrow3\left(70-x\right)+5=92\)
\(\Rightarrow3\left(70-x\right)=87\)
\(\Rightarrow70-x=29\Rightarrow x=41\)
c) \(\Rightarrow230+\left[16+\left(x-5\right)\right]=315\)
\(\Rightarrow11+x=85\Rightarrow x=74\)
d) \(\Rightarrow707:\left(2^x-5+74\right)=7\)
\(\Rightarrow2^x-5+74=101\Rightarrow2^x-5=27\)
\(\Rightarrow2^x=32\Rightarrow x=5\)
a) 9x - 18 = 34 : 32
9x - 18 = \(\frac{17}{16}\)
9x = \(\frac{17}{16}+18\)
9x = \(\frac{305}{16}\)
x = \(\frac{305}{16}:9\)
x = \(\frac{305}{144}\)
Vậy x = \(\frac{305}{144}\)
b)\(\Rightarrow x\inƯC\left(126;210\right)\hept{\begin{cases}126⋮x\\210⋮x\end{cases}}\)
Ta có : 126 = 2.32.7
210 = 2.3.5.7
\(\Rightarrow\)ƯCLN(126;210) = 2.3.7 = 42
\(\Rightarrow\)ƯC(126;210) = Ư(42) = (1;2;3;6;7;14;21;42) mà 16 < x < 30 \(\Rightarrow\)x = 21
Vậy x = 21
c) 25 + 5x -43 = 251
25 + 5x - 64 = 251
25 + 5x = 251 + 64
25 + 5x = 315
5x = 315 - 25
5x = 290
x = 58
Vậy x = 58
a, `442 + (418 - x) = 860`
` 418 - x = 860 - 442`
`418 - x = 418`
`x=418 - 418`
`x=0`
Vậy `x=0`
b, `(210 - x) + 107 = 317`
`(210 - x) = 317 - 107`
`210 - x = 210`
`x=210 - 210`
`x=0`
Vậy `x=0`
c, `(x - 32) - 68 = 0`
`(x - 32) = 0+68`
`x - 32= 68`
`x=68+32`
`x=100`
Vậy `x=100`
d, `274 - (x + 18) = 4`
`(x + 18) = 274 - 4`
`x+18=270`
`x=270-18`
`x=252`
Vậy `x=252`
a: =>418-x=418
=>x=0
b: =>210-x=210
=>x=0
c: =>x-100=0
=>x=100
d: =>x+18=270
=>x=252