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Bài làm :
\(a,23+x:2=37\)
\(x:2=14\)
\(x=14\times2\)
\(x=28\)
\(b,x-320:32=4\times16\)
\(x-10=64\)
\(x=64+10\)
\(x=74\)
\(c,3x-2018:2=23\)
\(3x-1009=23\)
\(3x=23+1009\)
\(3x=1032\)
\(x=344\)
\(d,\left(9x-21\right):3=2\)
\(9x-21=6\)
\(9x=6+21\)
\(9x=27\)
\(x=3\)
\(e,15:x+120:12=15\)
\(15:x+10=15\)
\(15:x=15-10\)
\(15:x=5\)
\(x=3\)
Học tốt nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
a)320 + ( 218-x)=475
( 218-x)=475-320
( 218-x)=155
x =218-155
x =63
b)315-6/x=275
6/x=315-275
6/x=40
x=40.6
x=240
c)4*(x-15)+32=64
4*(x-15) =64-32
4*(x-15) = 32
4*(x-15) =32:4
4*(x-15) =8
(x-15) =8:4
(x-15) =2
x =2+15
x =17
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 25 - (3 * x - 4) - 2 = 18 b) 256 - ( x + 71 ) = 92 c) ( x - 45 ) - 320 = 0
25 - (3 * x - 4) = 18 + 2 x + 71 = 256 - 92 x - 45 = 0 + 320
25 - (3 * x - 4) = 20 x + 71 = 164 x - 45 = 320
3 * x - 4 = 5 x = 164 - 71 x = 320 + 45
3 * x = 5 + 4 x = 93 x = 365
3 * x = 9
x = 9 : 3
x = 3
d) x : 45 = 346 e) 3270 : x = 15
x = 346 . 45 x = 3270 : 15
x = 15570 x = 218
nhớ ủng hộ mik nghen
![](https://rs.olm.vn/images/avt/0.png?1311)
x : 0,25 + x : 0,5 + x : 0,1 = 320
x x 4 + x x 2 + x x 10 = 320
x x( 4+ 2 + 10) = 320
x x 16 = 320
x = 320 : 16
x = 20
![](https://rs.olm.vn/images/avt/0.png?1311)
a) (58 + x) : 5 = 18
58 + x = 18 x 5
58 + x = 90
x = 90 - 58
x = 32
d) 320 : x - 10 = 5 x 48 : 24
320 : x - 10 = 10
320 : x = 10 + 10
320 : x = 20
x = 320 : 20
x = 16
c) (1/15 + 1/35 + 1/63) . x = 1
1/9 . x = 1
x = 1 : 1/9
x = 9
![](https://rs.olm.vn/images/avt/0.png?1311)
a) x + 1/15 = 1/3 - 1/4 = 4/12 - 3/12 = 1/12.
=> x = 1/12 - 1/15 = 5/60 - 4/60 = 1/60.
b) x - 5/12 = 1/3 + 1/4 = 4/12 + 3/12 = 7/12.
=> x = 7/12 + 5/12 = 1
c) x x 2/7 = 3/4 x 4/15 = 1/5
=> x = 1/5 : 2/7 = 1/5 x 7/2 = 7/10
d) x : 3/8 = 4/3 : 3/6 = 4/3 x 2 = 8/3
=> x = 8/3 x 3/8 = 1
![](https://rs.olm.vn/images/avt/0.png?1311)
bài2 \(x\times\dfrac{15}{16}-x\times\dfrac{4}{16}=2\)
\(x\times\dfrac{11}{16}=2\)
\(x=2:\dfrac{11}{16}\)
\(x=\dfrac{32}{11}\)
Bài 1 :
\(\dfrac{x}{16}\times\left(2017-1\right)=2\)
\(\dfrac{x}{16}\times2016=2\)
\(\dfrac{x}{16}=\dfrac{2}{2016}\)
\(x=\dfrac{2}{2016}\times16\)
\(x=\dfrac{1}{63}\)
(x+15)+(x-3)+(x-4)=320
x+15+x-3+x-4=320
3x+15-3-4=320
3x+15-3=320+4
3x+15-3=324
3x+15=324+3
3x+15=327
3x=327-15
3x=312
x=312/3
x=104
đáp án:?????
K nha!Kết bạn nha!bài này hỏi người khác cho dễ