Tìm x:
(x + 2)3 - 41 = 23
tìm x thuộc z: 27/23+-4/23+1/2+-4/8<x<7/3+13/41+28/41
\(\frac{27}{23}+\frac{-4}{23}+\frac{1}{2}+\frac{-4}{8}< x< \frac{7}{3}+\frac{13}{41}+\frac{28}{41}\)
\(\Rightarrow\frac{27}{23}-\frac{4}{23}+\frac{1}{2}-\frac{4}{8}< x< \frac{7}{3}+\frac{13}{41}+\frac{28}{41}\)
\(\Rightarrow1+0< x< \frac{7}{3}+\frac{3}{3}\)
\(\Rightarrow1< x< \frac{10}{3}\)
\(\Rightarrow1< x< 3,333333333\)
\(\Rightarrow x\in\left\{2;3\right\}\)
Vậy : ....
ta co : \(\frac{27}{23}+\frac{-4}{23}+\frac{1}{2}+\frac{-4}{8}< x< \frac{7}{3}+\frac{13}{41}+\frac{28}{41}\)
=> \(1< x< \frac{10}{3}\)
vi x la so nguyen => \(1< x\le3\)
con lai ban tu lam
Tìm x
128-3.(x+4)=23
[(4.x+28).3+55]:5=35
720:[41-(2.x-5)]
3.x+8.x-30=25
Nhanh các bạn ơi
128 - 3(x + 4) = 23
=> 3(x + 4) = 128 - 23
=> 3(x + 4) = 105
=> x + 4 = 105 : 3
=> x + 4 = 35
=> x = 35 - 4
=> x = 31
Vậy x = 31
[(4x + 28) . 3 + 55] : 5 = 35
=> (4x + 28) . 3 + 55 = 35 . 5
=> (4x + 28) . 3 + 55 = 175
=> (4x + 28) . 3 = 175 - 55
=> (4x + 28) . 3 = 120
=> 4x + 28 = 120 : 3
=> 4x + 28 = 40
=> 4x = 40 - 28
=> 4x = 12
=> x = 12 : 4
=> x = 3
Vậy x = 3
1. 128 - 3.(x+4) = 23
3.(x+4) = 5
x+4 = 5 : 3
x+4 = 5/3
x = -7/3
b) 1500.(x – 7) = 0
c) (2.x – 4).(48 – 12.x) = 0
d) (x + 12).(x – 1) =0
Bài 2: Tìm x biết:
a) 128- 3(x+ 4) = 23
b) [(14x+ 26). 3+ 55]: 5= 35
d) 720: [41- (2x- 5)]= 23. 5
b. 1500(x-7)=0
x-7=0
x=7
c. (2x-4)(48-12x)=0
2x-4=0 hoặc 48-12x=0
x=2 hoặc x=4
d. (x+12)(x-1)=0
x+12=0 hoặc x-1=0
x=-12 hoặc x=1
bài 2 :
a . 128-3(x+4)=23
3(x+4)=105
x+4=35
x=31
b. [(14X+26).3+55]:5=35
(14x+26).3+55=175
(14x+26).3=120
14x+26=40
14x=14
x=1
d. 720:[41-(2X-5)]=23.5
41-(2x-5)=720:(23.5)
41-(2x-5)=144/23
2x-5=799/23
2x=914/23
x=457/23
b, 1500.(x – 7) = 0
<=>1500x-10500=0
<=>1500x=10500
<=>x=7
Vậy x=7
c,(2.x – 4).(48 – 12.x) = 0
\(\Leftrightarrow\)\(\left\{{}\begin{matrix}2x-4=0\\48-12x=0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}2x=4\\12x=48\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=2\\x=4\end{matrix}\right.\)
Vậy x=2 hoặc x=4
d, (x + 12).(x – 1) =0
\(\Leftrightarrow\left\{{}\begin{matrix}x+12=0\\x-1=0\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=-12\\x=1\end{matrix}\right.\)
Vậy x=-12 hoặc x=1
Bài 2:
a) 128- 3(x+ 4) = 23
\(\Leftrightarrow\)128-(3x+12)=23
\(\Leftrightarrow\)128-3x-12=23
\(\Leftrightarrow\)116-3x=23
\(\Leftrightarrow\)3x=116-23
\(\Leftrightarrow\)3x=93
\(\Leftrightarrow\)x=31
Vậy x=31
b) [(14x+ 26). 3+ 55]: 5= 35
\(\Leftrightarrow\)(14x+ 26). 3+ 55=175
\(\Leftrightarrow\)42x+78+55=175
\(\Leftrightarrow\)42x+133=175
\(\Leftrightarrow\)42x=175-133
\(\Leftrightarrow\)42x=42
\(\Leftrightarrow\)x=1
Vậy x=1
d, 720: [41- (2x- 5)]= 23. 5
\(\Leftrightarrow\)720: 41- (2x- 5)=115
\(\Leftrightarrow\)41-(2x- 5)=720:115
\(\Leftrightarrow\)41-(2x- 5)=\(\dfrac{144}{23}\)
\(\Leftrightarrow\)2x-5=\(\dfrac{799}{23}\)
\(\Leftrightarrow\)2x=\(\dfrac{914}{23}\)
\(\Leftrightarrow\)x=\(\dfrac{457}{23}\)
Vậy x=\(\dfrac{457}{23}\)
tìm x
32 + x = 45
45 -x = 23
66 - x + 3 = 41
32+x=45
x=45-32
x=13
45-x=23
x=45-23
x=22
66-x+3=41
66-x+3=41-3
66-x =38
x =66-38
x =28
32 + x = 45
x = 45 - 32
x = 13
45 - x = 23
x = 45 - 23
x = 22
66 - x + 3 = 41
66 - x = 38
x = 66 - 38
x = 28
32 + x = 45
x = 45 - 32
x = 13
45 - x = 23
x = 45 - 23
x = 22
66 - x + 3 = 41
x + 3 = 66 - 41
x + 3 = 25
x = 25 - 3
x = 22
a) x – 36 : 18 = 12 – 15
b) 92 – (17 + x) = 72
c) 720 : [41 – (2x + 5)] = 40
d) (x + 2)3 - 23 = 41
\(a,x-36:18=12-15\\ \Rightarrow x-2=-3\\ \Rightarrow x=-1\\ b,92-\left(17+x\right)=72\\ \Rightarrow17+x=20\\ \Rightarrow x=3\\ c,720:\left[41-\left(2x+5\right)\right]=40\\ \Rightarrow41-\left(2x+5\right)=18\\ \Rightarrow2x+5=23\\ \Rightarrow2x=18\\ \Rightarrow x=9\\ d,\left(x+2\right)^3-23=41\\ \Rightarrow\left(x+2\right)^3=64\\ \Rightarrow\left(x+2\right)^3=4^3\\ \Rightarrow x+2=4\\ \Rightarrow x=2\)
b: =>x+17=20
hay x=3
d: =>x+2=4
hay x=2
tìm x nguyên biết 3 nhân (x+6) - 5 mũ 3 = 2 nhân (x-8) -1
(2+x) mũ 3 - 23 = 41
Tìm x , biết
a.128 - 3 ×( x +2 ) =23
b. ( 12 × x -64 ) × 8 = 4,64
c. [( 4 × x +28) × 3 + 55 ] : 5 = 35
d. 720 : [ 41 - ( 2 × x - 5 )] = 8 × 5
a. 128 - 3 x (X + 2) = 23
3 x (X + 2) = 128 - 23
X + 2 = 105 : 3
X = 35 - 2
X = 33
b. (12 x X - 64) x 8 = 4,64
12 x X - 64 = 4,64 : 8
12 x X = 0,58 + 64
X = 64,58 : 12
X = \(\frac{3229}{600}\)
c. [(4 x X + 28) x 3 + 55] : 5 = 35
[(4 x X + 28) x 3 + 55] = 35 x 5
(4 x X + 28) x 3 = 175 - 55
4 x X + 28 = 120 : 3
4 x X = 40 - 28
X = 12 : 4
X = 3
d. 720 : [41 - (2 x X - 5)] = 8 x 5
41 - (2 x X - 5) = 720 : (8 x 5)
2 x X - 5 = 41 - 18
2 x X = 23 + 5
X = 28 : 2
X = 14
x nhỏ : dấu nhân
X lớn : X
thực hiện phép tính :
a, -1/2 + 19/23+ -9/2+ 4/23 +3 /-6
b. 5/13+ -5/7 +-20/41 + 8/13 +-21/41
c.-5/7 x 19/41 + 5/7 x -21/41 + 5/7
d. 7/3 +1/2 - -3/70
Đây là phân số
bài 1 tìm x biết
128-3(x+4)=23
[(14x+26)-3+55]/5=35
(x+12)^2.(x-1)=0
720/[41-(2x-5)]=22.5
128 - 3 ( x + 4 ) = 23
3 ( x + 4 ) = 128 - 23
3 ( x + 4 ) = 105
x + 4 = 105 : 5
x + 4 = 35
x = 35 - 4
x = 31
128 - 3 ( x + 4 ) = 23
3 ( x + 4 ) = 128 - 23
3 ( x + 4 ) = 105
x + 4 = 105 : 5
x + 4 = 35
x = 35 - 4
x = 31
k mik nha
5 lấy đâu ra vậy Bùi Đình Hải?