4.x+2.[3.x-11]=134
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NN
0
PT
0
7 tháng 3 2022
\(a,x-\dfrac{1}{4}=\dfrac{7}{2}.\dfrac{-3}{5}\\ \Rightarrow x-\dfrac{1}{4}=\dfrac{-21}{10}\\ \Rightarrow x=\dfrac{-21}{10}+\dfrac{1}{4}\\ \Rightarrow x=\dfrac{-37}{20}\\ b,\dfrac{x}{134}=\dfrac{9}{7}.\dfrac{5}{-11}\\ \Rightarrow\dfrac{x}{134}=\dfrac{-45}{77}\\ \Rightarrow x=\dfrac{-45}{77}.134\\ \Rightarrow x=\dfrac{-6030}{77}\)
O
7 tháng 3 2022
\(x-\dfrac{1}{4}=\dfrac{7}{2}\cdot\dfrac{-3}{5}\)
\(x-\dfrac{1}{4}=\dfrac{-21}{10}\)
\(x=\dfrac{-21}{10}+\dfrac{1}{4}\)
\(x=\dfrac{-37}{20}\)
b ) \(\dfrac{x}{134}=\dfrac{9}{7}\cdot\dfrac{5}{-11}\)
\(\dfrac{x}{134}=\dfrac{9}{7}\cdot\dfrac{-5}{11}\)
\(\dfrac{x}{134}=\dfrac{-45}{77}\)
\(x=\dfrac{-45}{77}\cdot134\)
\(x=-\dfrac{6034}{77}\)
NH
4
19 tháng 8 2023
a: =>7(135:x-13)=14
=>135:x-13=2
=>135:x=15
=>x=9
b: =>11x-66-4x=11
=>7x=77
=>x=11
H9
HT.Phong (9A5)
CTVHS
19 tháng 8 2023
\(120+\left(135:x-13\right)\cdot7=134\)
\(\Rightarrow\left(135:x-13\right)\cdot7=134-120\)
\(\Rightarrow\left(135:x-13\right)\cdot7=14\)
\(\Rightarrow135:x-13=14:7\)
\(\Rightarrow135:x=2+13\)
\(\Rightarrow135:x=15\)
\(\Rightarrow x=135:15\)
\(\Rightarrow x=9\)
_______________
\(11\cdot\left(x-6\right)=4\cdot x+11\)
\(\Rightarrow11\cdot x-66=4\cdot x+11\)
\(\Rightarrow11\cdot x-4\cdot x=11+66\)
\(\Rightarrow7\cdot x=77\)
\(\Rightarrow x=77:7\)
\(\Rightarrow x=11\)
TT
1
21 tháng 9 2020
a) (x + 23) - 14 = 11
=> x + 23 - 14 = 11
=> x + 9 = 11
=> x = 11 - 9 = 2
b) 2.x + 13 = 43
=> 2.x = 43 - 13
=> 2.x = 30
=> x = 15
c) 2(x - 1) - 156 = 196
=> 2x - 2 = 352
=> 2x = 354
=> x = 177
3(134 - x) + 1 = 211
=> 3(134 - x) = 210
=> 134 - x = 70
=> x = 134 - 70 = 64
h) 156 - 2(x + 2) = 128
=> 2(x + 2) = 156 - 128 = 28
=> x + 2 = 28 : 2
=> x + 2 = 14
=> x = 12
TH
2
H
1 tháng 11 2023
`136 -4^2 : x=134`
`=> 136-16:x=134`
`=> 16:x= 136-134`
`=> 16:x=2`
`=>x=16:2`
`=>x=8`
__
`19-5(x-1)=4`
`=> 5(x-1)=19-4`
`=> 5(x-1) =15`
`=> x-1=15:5`
`=>x-1=3`
`=>x=3+1`
`=>x=4`
__
`257-(x^2-1) =177`
`=>x^2-1=257-177`
`=>x^2-1=80`
`=>x^2=80+1`
`=>x^2=81`
`=>x^2=(+- 9)^2`
`=> x= +- 9`
__
`(x^2-17) : 8=2^3`
`=> x^2 -17 = 8 * 8`
`=> x^2 -17= 64`
`=> x^2 =64+17`
`=>x^2=81`
`=>x^2=(+- 9)^2`
`=> x= +- 9`
KV
1 tháng 11 2023
136 - 4² : x = 134
4² : x = 136 - 134
8 : x = 2
x = 8 : 2
x = 4
--------
129 - 5(x - 1) = 4
5(x - 1) = 129 - 4
5(x - 1) = 125
x - 1 = 125 : 5
x - 1 = 25
x = 25 + 1
x = 26
------------
257 - (x² - 1) = 177
x² - 1 = 257 - 177
x² - 1 = 80
x² = 80 + 1
x² = 81
x = -9 hoặc x = 9
--------
(x² - 17) : 8 = 8
x² - 17 = 8 . 8
x² - 17 = 64
x² = 64 + 17
x² = 81
x = -9 hoặc x = 9
PN
29 tháng 7 2020
a,\(\left(x-15\right):50+22=24\)
\(< =>\frac{\left(x-15\right)}{50}=2< =>x-15=100\)
\(< =>x=100+15=115\)
b,\(42-\left(2x+32\right)+12:2=6\)
\(< =>42-2x-32=0\)
\(< =>10-2x=0< =>x=\frac{10}{2}=5\)
29 tháng 7 2020
Làm nốt :
c) \(134-2\left\{156-6\cdot\left[54-2\cdot\left(9+6\right)\right]\right\}\cdot x=86\)
=> 134 - 2{156 - 6 . [54 - 2 . 15]} . x = 86
=> 134 - 2{156 - 6 . [54 - 30]} . x = 86
=> 134 - 2{156 - 6. 24} . x = 86
=> 134 - 2{156 - 144} . x = 86
=> 134 - 2.12 . x = 86
=> 134 - 24 . x = 86
=> 24.x = 48
=> x = 2
Bài 2 : a) 120 : [21 - (4x - 4)] = 23.3
=> 120 : [21 - (4x - 4)] = 8.3
=> 120 : [21 - (4x - 4)] = 24
=> 21 - (4x - 4) = 5
=> 4x - 4 = 16
=> 4x = 20
=> x = 5
b) 3.[205 - (x - 9)] - 486 = 0
=> 3.[205 - (x - 9)] = 486
=> 205 - (x - 9) = 162
=> x - 9 = 205 - 162 = 43
=> x = 43 + 9 = 52
c) 204 - 2{200 - 5.[64 - 2.(11 + 6)]} . x = 4
=> 204 - 2{200 - 5.[64 - 2.17]} . x = 4
=> 204 - 2{200 - 5 .[64 - 34]}.x = 4
=> 204 - 2{200 - 5.30} . x = 4
=> 204 - 2{200 - 150}.x = 4
=> 204 - 2.50 . x = 4
=> 2.50.x = 200
=> 100.x = 200
=> x = 2
PA
31 tháng 1 2017
a) (−11)2 − 15(x − 2) = 134 − 16x
121 - 15x + 30 = 134 - 16x
16x - 15x = 134 - 121 - 30
x = -17
b) (4x + 1)(x2 − 16)=0
(4x + 1)(x - 4)(x + 4) = 0
\(\left[\begin{matrix}4x+1=0\\x-4=0\\x+4=0\end{matrix}\right.\)
\(\left[\begin{matrix}4x=-1\\x=4\\x=-4\end{matrix}\right.\)
\(\left[\begin{matrix}x=-\frac{1}{4}\\x=4\\x=-4\end{matrix}\right.\)
c) − 2(x − 3) + (− 2)2 = 4 − 3x
3x + 4 - 2x + 6 = 4
x = 4 - 4 - 6
x = - 6
134 = x.2=45
x=45
4.\(x\) + 2.[3.\(x\) - 11] = 134
4.\(x\) + 6.\(x\) - 22 = 134
10\(x\) = 134 + 22
10\(x\) = 156
\(x\) = 156 : 10
\(x\) = 15,6