Tim x :
a) 5x - 36 : 18 = 13
b) ( 5x - 36 ) : 18 = 13
tim x
( 5x - 36 ) : 18 = 13
Tìm x
( 5x - 36 ) : 18 = 13
=> 5x - 36 = 234
=> 5x = 234 + 36
=> 5x = 270
=> x = 270 : 5
=> x = 54
\(\left(5x-36\right):18=13\)
\(5x-36=13.18\)
\(5x-36=234\)
\(5x=234+36\)
\(5x=270\)
\(x=\frac{270}{5}\)
\(x=54\)
(5x - 36) : 18 = 13
5x - 36 = 13.18
5x - 36 = 234
5x = 234 + 36
5x = 270
x = 270 : 5
x = 54
Vậy x = 54
Chúc bạn học tốt!
Tìm số tự nhiên x, biết:
a) 5x – 36 : 18 = 13
a) 5x – 36 : 18 = 13
5x – 2 = 13
5x = 13+2
5x = 15
x = 15 :5
x = 3
Vậy x = 3
Tìm số tự nhiên x, biết:
c) (5x – 36) : 18 = 13
c) (5x – 36) : 18 = 13
(5x – 36) = 13.18
(5x – 36) = 234
5x = 234 + 36
5x = 270
x = 270:5
x = 54
Vậy x = 54
(5x - 36) : 18 = 12
(x -890) . (74 - x) = 0
1) \(\Rightarrow5x-36=216\)
\(\Rightarrow5x=252\Rightarrow x=\dfrac{252}{5}\)
2) \(\Rightarrow\left[{}\begin{matrix}x-890=0\\74-x=0\end{matrix}\right.\)\(\Rightarrow\left[{}\begin{matrix}x=890\\x=74\end{matrix}\right.\)
(5x-36):18=12
5x-36=216
5x=252
x=50,4
(x-890)(74-x)=0
=> x-890=0 hoặc 74-x=0
x=890 hoặc x=74
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
|
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
( x - 36 ) : 18 = 12
5x - 3 = 3x - 11
3x + 5x = 16
2 ( x + 1) = 10
\(\left(x-36\right):18=12\)
\(x-36=12.18\)
\(x-36=216\)
\(x=252\)
vậy \(x=252\)
\(5x-3=3x-11\)
\(5x-3x=-11+3\)
\(2x=-8\)
\(x=-4\)
vậy \(x=-4\)
\(3x+5x=16\)
\(8x=16\)
\(x=2\)
vậy \(x=2\)
\(2\left(x+1\right)=10\)
\(x+1=5\)
\(x=4\)
vậy \(x=4\)
k nha Pham Tuyet Nhung
1.=> x-36 = 216 = > x = 216 +36 =252
2. =>2x = -8 = > x= -4
3.8 x = 16 = > x = 2
4 . => x= 10 -1 = 9
ok có j ko hiểu hỏi riêng nha
( x - 36 ) : 18 = 12
x - 36 = 12 . 18
x - 36 = 216
x = 216 + 36
x = 252
5x - 3 = 3x - 11
5x - 3x = -11 + 3
2x = -8
x = -8 : 2
x = -4
3x + 5x = 16
8x = 16
x = 16 : 8
x = 2
2 ( x + 1 ) = 10
x + 1 = 10: 2
x + 1 = 5
x = 5-1
x = 4
tìm x, biết 2/9x 5x+1/2 -1/18=5/36
\(\frac{2}{9}.5x+\frac{1}{2}-\frac{1}{18}=\frac{5}{36}\)
\(\frac{2}{9}.5x=\frac{5}{36}+\frac{1}{18}-\frac{1}{2}\)
\(\frac{2}{9}.5x=\frac{-11}{36}\)
\(5x=\frac{-11}{36}:\frac{2}{9}\)
\(5x=\frac{-11}{8}\)
\(x=\frac{-11}{8}:5\)
\(x=\frac{-11}{40}\)
Chú ý dấu chấm là dâu nhân nha
tim x biet:
x - 36 : 18 = 12
(x - 36) : 18 = 12
1) \(x-36:18=12\)
\(\Rightarrow x-2=12\)
\(\Rightarrow x=14\)
2) \(\left(x-36\right):18=12\)
\(\Rightarrow x-36=216\)
\(\Rightarrow x=252\)
5x+x=36
2(x+4)-32=18
7x-2x=50
5x + x = 36
6x = 36
x = 36 : 6
x = 6
Vậy x = 6
2 ( x + 4 ) - 32 = 18
2 ( x + 4 ) = 18 + 32
2 ( x + 4 ) = 50
x + 4 = 50 : 2
x + 4 = 25
x = 25 - 4
x = 21
Vậy x = 21
7x - 2x = 50
5x = 50
x = 50 : 5
x = 10
Vậy x = 10
Chúc hok tốt
5x + x = 36
6x = 36
x = 6
2 ( x + 4 ) - 32 = 18
2 ( x + 4 ) = 50
x + 4 = 25
x = 21
7x - 2x = 50
5x = 50
x = 10