A x-47-115=0
Bx-36:18=12
C2x=16
Dx50=1
tìm x biết
a)12.(x-1)=0 b.(x-47)-115=0
c)x-36:18=12 d.(x-36):18=12
a, \(12\left(x-1\right)=0\Rightarrow x-1=0\Rightarrow x=1\)
b, \(\left(x-47\right)-115=0\Rightarrow x-47-115=0\)
\(\Rightarrow x=115+47=162\)
c, \(x-36:18=12\Rightarrow x-2=12\Rightarrow x=14\)
d, \(\left(x-36\right):18=12\Rightarrow x-36=216\Rightarrow x=252\)
Chúc bạn học tốt!!!
\(a.12\left(x-1\right)=0\)
\(x-1=0:12\)
\(x-1=0\)
\(x=0+1\)
\(x=1\)
\(b.\left(x-47\right)-115=0\)
\(x-47=0+115\)
\(x-47=115\)
\(x=115+47\)
\(x=162\)
\(c.x-36:18=12\)
\(x-36=12.18\)
\(x-36=216\)
\(x=216+36\)
\(x=252\)
\(d.\left(x-36\right):18=12\)
\(x-36=12.18\)
\(x-36=216\)
\(x=216+36\)
\(x=252\)
a) 12 . ( x - 1 ) = 0
x - 1 = 0 : 12
x - 1 = 0
x = 0 + 1
x = 1
b) ( x - 47 ) - 115 = 0
x - 47 = 0 + 115
x - 47 = 115
x = 115 + 47
x = 162
c) x - 36 : 18 = 12
x - ( 36 : 18) = 12
x - 2 = 12
x = 12 + 2
x = 14
d) (x - 36) : 18 = 12
x - 36 = 12 . 18
x - 36 = 216
x = 216 + 36
x = 252
Bài 2: Tìm x:
a) 156 – (x+ 61) = 82 b) (x-35) -120 = 0 c) 124 + (118 – x) = 217 d) 7x – 8 = 713 e) x- 36:18 = 12 f) (x- 36):18 = 12 g) (x-47) -115 = 0 |
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Bài 3: Tính nhanh
a) 58.75 + 58.50 – 58.25 b) 27.39 + 27.63 – 2.27 c) 128.46 + 128.32 + 128.22 d) 66.25 + 5.66 + 66.14 + 33.66 e) 12.35 + 35.182 – 35.94 | f) 48.19 + 48.115 + 134.52 g) 27.121 – 87.27 + 73.34 h) 125.98 – 125.46 – 52.25 i) 136.23 + 136.17 – 40.36 j) 17.93 + 116.83 + 17.23 | k) 35.23 + 35.41 + 64.65 l) 29.87 – 29.23 + 64.71 m) 19.27 + 47.81 + 19.20
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Bài 4: Tính giá trị của biểu thức sau:
a) 2763 + 152 b) (-7) + (-14) c) (-35) + (-9) d) (-5) + (-248) e) (-23) + 105 f) 78 + (-123) g) 23 + (-13) h) (-23) + 13 i) 26 + (-6) | j) 80 + (-220) k) (-23) + (-13) l) (-26) + (-6) | m) 12 – 34 n) -23 – 47 o) 31 – (-23) p) -9 – (-5) q) 6 – (8 – 17) r) 19 + (23 – 33) s) (-12 – 44) + (-3) t) 4 – (-15) u) -29 – 23 | v) 99 – [109 + (-9)] w) (-75) + 50 x) (-75) + (-50) y) (-23) + 13 + ( - 17) + 57 z) 14 + 6 + (-9) + (-14)
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a: =>x+61=74
hay x=13
b: =>x-35=120
hay x=155
d: =>7x=721
hay x=103
Bài4:Tìm x:
a. 124 + (118 – x) = 217 b. 7x – 8 = 713 c. x- 36:18 = 12 d. (x- 36):18 = 12 e. (x-47) -115 = 0 f. 315 + (146 – x) = 401 | g. (6x – 39 ) : 3 = 201 h. 23 + 3x = 56 : 53 i. 5x + x = 39 – 311:39 j. 7x – x = 521 : 519 + 3.22 - 70 k. 7x – 2x = 617: 615 + 44 : 11 l. 0 : x = 0 | m. 3x = 9 n. 4x = 64 o. 2x = 16 p. 9x- 1 = 9 q. x4 = 16 r. 2x : 25 = 1 |
Bài4:Tínhnhanh
1. 58.75 + 58.50 – 58.25 2. 27.39 + 27.63 – 2.27 3. 128.46 + 128.32 + 128.22 4. 87.23 + 13.93 + 70.87
| 5. 12.35 + 35.182 – 35.94 6. 48.19 + 48.115 + 134.52 7. 27.121 – 87.27 + 73.34 8. 136.23 + 136.17 – 40.36 9. 125.98 – 125.46 – 52.25 | 10. 17.93 + 116.83 + 17.233 11. 5.23 + 35.41 + 64.65 12. 29.87 – 29.23 + 64.71 13. 19.27 + 47.81 + 19.20
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b: Ta có: 7x-8=713
nên 7x=721
hay x=103
c: Ta có: x-36:18=12
nên x-2=12
hay x=14
d: Ta có: (x-36):18=12
nên x-36=216
hay x=252
a. 124 + (118 – x) = 217
118 - x = 93
- x = - 25
x = 25
b. 7x – 8 = 713
7x =721
x =103
c. x- 36:18 = 12
x- 2 =12
x =14
d. (x- 36):18 = 12
x-36 = 216
x = 252
e. (x-47) -115 = 0
x-47 = 115
x = 162
f. 315 + (146 – x) = 401
146-x =86
-x = -60
x = 60
g. (6x – 39 ) : 3 = 201
6x - 39 = 603
6x = 642
x = 107
h. 23 + 3x = 56 : 53
23 +3x = 125
3x = 102
x=34
tìm x biết: a, (x-47)-115=0
b, (x-36)/18=12
a, ( x - 47 ) - 115 = 0
=> x - 47 = 115 => x = 162 .
b, ( x - 36 ) : 18 = 12
=> x - 36 = 216 => x = 252 .
a.(x-47)-115=0
(x-47)=115
x=115+47
x=162
b. (x-36):18=12
x-36=12.18
x-36=204
x=204+36
x=240
tìm số tự nhiên x, biết :
a, (x-47)-115 = 0
b, 315+( 146-x) = 401
c,2436:x = 12
d, 6.x -5 = 613
e, 12: ( x-1) = 0
f, 0 :x =0
g, (x-36) :18 = 12
h, x - 36:18 =12
Tìm X:
a.2436 :x = 12
b. 6 x - 5 = 613
c.( x - 47 ) - 115 = 7
d . 315 + (146 - x ) =401
e.( x - 36 ) : 18 = 12
a.2436 :x = 12
x = 2436 : 12
x = 203
b. 6x - 5 = 613
6x = 613 + 5
6x = 618
x = 618 : 6
x = 13
c.( x - 47 ) - 115 = 7
x - 47 = 7 + 115
x - 47 = 122
x = 122 + 47
x =169
d . 315 + (146 - x ) =401
146 - x = 401 - 315
146 - x = 86
x = 146 - 86
x = 60
e.( x - 36 ) : 18 = 12
x - 36 = 12 x 18
x - 36 = 216
x = 216 + 36
x = 252
a , 2 436 : x = 12
x = 2 436 : 12
x = 203
b , 6x - 5 = 613
6x = 618
x = 103
c , ( x - 47 ) - 115 = 7
x - 47 = 122
x = 169
d , 315 + ( 146 - x ) = 401
146 - x = 401 - 315
146 - x = 86
x = 146 - 86
x = 60
e , ( x - 36 ) : 18 = 12
x - 36 = 216
x = 216 + 36
x = 252
a) 2436 : x = 12 b) 6x - 5 = 613 c) ( x - 47 ) - 115 = 7 d) 315 + ( 146 - x ) = 401
x = 2436 : 12 6x = 613 + 5 x - 47 = 7 + 115 146 - x = 401 - 315
x = 203 6x = 618 x - 47 = 122 146 - x = 86
x = 618 : 6 x = 122 + 47 x = 146 - 86
x = 103 x = 169 x = 60
tìm x thuộc N biết :
(x-5) (x-7)=0
541+(218-x)=735
96-3(x+1)=42
(x-47)-115=0
(x-36):18=12
(x-5)(x-7)=0
=> x-5=0 hoặc x-7=0
=> x=5 hoặc x=7
541+(218-x)=735
=> 218-x=735-541
=> 218-x=194
=> x=218-194
=> x=24
96-3(x+1)=42
=>3(x+1)=96-42
=>3(x+1)=54
=>x+1=54:3
=>x+1=18
=>x=18-1
=>x=17
(x-47)-115=0
=>x-47=0+115
=>x-47=115
=>x=115+47
=>x=162
(x-36):18=12
=>x-36=12.18
=>x-36=216
=>x=216+36
=>x=252
(x-5).(x-7)=0
x-5=0+7
x=7+5
x=12
541+(218-x)=735
218-x=735-541
x=218-196
x=12
96-3(x+1)=42
3(x+1)=96-42
x+1=54:3
x=17-1
x=16
(x-47)-115=0
x-47=0+115
x=115+47
x=162
(x-36):12=18
x-36=12*18
x-36=216
x=216+36
x=252
X=252 nha bạn Anh Anh nhớ tk mình và kb nha
a/541+(218-x)=735
b/96-3(x+1)=42
c/(x-47)-115=0
d/(x-36):18=12
e/2^x=16
f/x^50=x
g/2^x.4=128
h/x^15=x
i/(2^x+1)^3=125