tìm x
[ ( 8x - 12 ) : 4 ] . 33 = 36
Tìm x
a) [( 8x - 12 ) : 4] .33=36
b) 41 - 2x+1 = 9
\(a.\left[\left(8x-12\right):4\right]\cdot3^3=3^6\\ \left(8x-12\right):4=3^6:3^3\\ \left(8x-12\right):4=27\\ 8x-12=27\cdot4\\ 8x-12=108\\ 8x=108+12\\ 8x=120\\ x=15\\ b.41-2^{x+1}=9\\ 2^{x+1}=32\\ 2^{x+1}=2^5\\=> x+1=5\\ =>x=4\)
a,[(8x-12):4].33=36
(8x-12):4=36:33
(8x-12):4=33
(8x-12):4=9
8x-12=9.4
8x-12=36
8x=36+12
8x=48
x=6
Vậy x=6
b,41-2x+1=9
2x+1=41-9
2x+1=32
2x+1=25
x+1=5
x=5-1
x=4
Vậy x=4
Chúc bạn học tốt:33
Có bao nhiêu giá trị của x thỏa mãn [(8x−12):4]. 3 3 = 3 6
A. 3
B. 2
C. 1
D. 4
a. 219 - 7(x + 1) = 100 b. ( 3x - 6).3 = 36 c. 716 - (x - 143) = 659
d. 30 - [4(x - 2) + 15] = 3 e. [(8x - 12) : 4].33 = 36
a.219 - 7(x+1) = 100
7(x+1) = 219 - 100
7(x+1) = 119
x + 1 = 119 : 7
x + 1 = 17
x = 17 - 1
x = 16
b. (3x - 6 ) . 3 = 36
3x - 6 = 36 : 3
3x - 6 = 12
3x = 12 + 6
3x = 18
x = 18 : 3
x = 6
c.716 - ( x-143) = 659
x-143 = 716 - 659
x-143 = 57
x = 57 + 143
x = 200
b. 30 - [4(x-2)+15] = 3
4(x-2) + 15 = 30 - 3
4(x-2)+15 = 27
4(x-2) = 27 - 15
4(x-2) = 12
x-2 = 12 : 4
x-2 = 3
x = 2 + 3 = 5
e.[(8x - 12) : 4] .33 = 36
[(8x - 12) : 4] . 27 = 729
(8x - 12) : 4 = 729 : 27 = 27
8x - 12 = 27 . 4 = 108
8x = 108 + 12 = 120
x = 120 : 8 = 15
a) \(\Leftrightarrow7\left(x+1\right)=119\\ \Leftrightarrow x+1=17\\ \Leftrightarrow x=16\)
b) \(\Leftrightarrow9\left(x-2\right)=36\\ \Leftrightarrow x-2=4\\ \Leftrightarrow x=6\)
c) \(\Leftrightarrow x-143=57\\ \Leftrightarrow x=200\)
d) \(\Leftrightarrow4\left(x-2\right)+15=27\\ \Leftrightarrow4\left(x-2\right)=12\\ \Leftrightarrow x-2=3\\ \Leftrightarrow x=5\)
e) \(\Leftrightarrow\left(2x-3\right).4:4=3^3\\ \Leftrightarrow2x-3=27\\ \Leftrightarrow2x=24\\ \Leftrightarrow x=12\)
a. 219 - 7(x + 1) = 100 b. ( 3x - 6).3 = 36 c. 716 - (x - 143) = 659
7(x+1)=119 3x-6=12 716-x+143=659
x+1=17 3x=18 859-x=659
x=16 x=6 x=200
d. 30 - [4(x - 2) + 15] = 3 e. [(8x - 12) : 4].33 = 36
4(x-2)+15=27 (8x-12):4=27
4(x-2)=12 8x-12=6,75
x-2=3 8x=18,75
x=5 x=\(\dfrac{75}{32}\)
[(8x - 12) : 4] . 33 = 36
\(\left[\left(8x-12\right):4\right].3^3=3^6\)
\(\Leftrightarrow\left(8x-12\right):4=3^3\)
\(\Leftrightarrow2x-3=27\Leftrightarrow2x=30\Leftrightarrow x=15\)
[(8x-12):4].33=36
(8x-12):4=33
(8x-12):4=27
⇒8x-12=108
⇒8x=120
⇒x=15
\(\dfrac{8x-12}{4}.3^3=3^6\)
\(\Rightarrow\dfrac{8x-12}{4}=3^3\)
\(\Rightarrow8x-12=108\)
\(\Rightarrow8x=120\)
\(\Rightarrow x=15\)
[8x-12]:4).33=36
30-[4.(x-2)+15]=3
[( 8x - 12 ) : 4 ] . 33 = 36
[ ( 8x - 12 ) : 4 ] = 12/11
( 8x - 12 ) = 12/11 . 4
( 8x - 12 ) = 48/11
8x = 48/11 + 12
8x = 180/11
x = 45/22
\(\left[\left(8x-12\right):4\right].33=36\)
\(\left(8x-12\right):4=\frac{12}{11}\)
\(8x-12=\frac{48}{11}\)
\(8x=\frac{180}{11}\)
\(x=\frac{45}{22}\approx2,045\)
\(30-\left[4.\left(x-2\right)+15\right]=3\)
\(4.\left(x-2\right)+15=27\)
\(4.\left(x-2\right)=12\)
\(x-2=3\)
\(x=5\)
\(a,\left[\left(8x-12\right)\div4\right].33=36\)
\(\Leftrightarrow\left(8x-12\right)\div4=36\div33\)
\(\Leftrightarrow\left(8x-12\right)\div4=\frac{12}{11}\)
\(\Leftrightarrow8x-12=\frac{12}{11}\times4\)
\(\Leftrightarrow8x-12=\frac{48}{11}\)
\(\Leftrightarrow8x=\frac{48}{11}+12\)
\(\Leftrightarrow8x=\frac{180}{11}\)
\(\Leftrightarrow x=\frac{180}{11}\div8\)
\(\Leftrightarrow x=\frac{45}{22}\)
\(b,30-\left[4.\left(x-2\right)+15\right]=3\)
\(\Leftrightarrow4.\left(x-2\right)+15=30-3\)
\(\Leftrightarrow4x-8+15=27\)
\(\Leftrightarrow4x-8=27-15\)
\(\Leftrightarrow4x-8=12\)
\(\Leftrightarrow4x=12+8\)
\(\Leftrightarrow4x=20\)
\(\Leftrightarrow x=20\div4\)
\(\Leftrightarrow x=5\)
x -56 : 4= 16
101 +(36 –4x) =105
2(x-51) = 2.23+ 20
10 -(x –3): 2 = 72–110
2x –49 = 5.32
[(8x -12) : 4].33= 36
52x –3–2 . 52= 52. 3
(x3–7) : 4 = 5
a: x-56:4=16
nên x-14=16
hay x=30
b: \(101+\left(36-4x\right)=105\)
\(\Leftrightarrow36-4x=4\)
hay x=8
Vì a: x-56:4=16
=>x-14=16
Hay:x=30
Vì b: 101+(36−4x)=105101+(36−4x)=105
⇔36−4x=4⇔36−4x=4
Hay:x=8
Vậy x={30:8}
Nếu sai thì thui nhá,đừng chửi mình!
Tìm số tự nhiên x,biết:
a)58 + 7x = 100
b) ( x –12):12=12
c) x -56 : 4= 16
d) 101 +(36 –4x) =105
e) 2(x-51) = 2.23+ 20
f) 10 -(x –3): 2 = 72–110
g) 2x –49 = 5.32h) [(8x -12) : 4].33= 36
i) 52x –3–2 . 52= 52. 3 k) (x3–7) : 4 = 5
a: 7x+58=100
nên 7x=42
hay x=6
c: x-56:x=16
nên x-14=16
hay x=30
c)x - 56 : 4 = 16
x - 56 = 16 : 4
x- 56 = 4
x =4 + 56
x = 60
d)101 + (36 - 4x) = 105
(36- 4x ) = 105 - 101
36 - 4x = 4
4x = 36 - 4
4x = 32
x = 32:4
x = 8
a) 58 + 7x = 100
7x = 100 - 58
7x = 42
x = 42 : 7
x = 6
b) (x - 12) : 12 = 12
x - 12 = 12 . 12
x - 12 = 144
x = 144 + 12
x = 156
Mọi người ơi giúp mình với, mình cần gấp ạ !
Tìm x : (8x-3)(3x+2)-(4x+7)(x+4)=(2x+1)(5x-1)-33
(8x-3)(3x+2)-(4x+7)(x+4) = (2x+1)(5x-1)-33
(24x2-9x+16x-6)-(4x2+7x+16x+28) = (10x2+5x-2x-1)-33
24x2+7x-6-4x2-23x-28 = 10x2+3x-1-33
20x2-16x-34 = 10x2+3x-34
<=> 20x2-16x = 10x2+3x
2x2-19x=0
2x(x-19)=0
=>\(\left[{}\begin{matrix}2x=0\Rightarrow x=0\\x-19=0\Rightarrow x=19\end{matrix}\right.\)
Không chắc lắm :)
A=[(8x-12):4].36=39voi x=0
Sửa đề: +3^9
A=[(8x-12):4]*3^6+3^9
=(2x-3)*3^6+3^9
=(-3)*3^6+3^9
=3^9-3^7
=17496
tìm x
2(x+4)+12=36
2(x + 4) + 12 = 36
2(x + 4) = 36 - 12
2(x + 4) = 24
x + 4 = 24 : 2
x + 4 = 12
x = 12 - 4
x = 8
2(x + 4) + 12 = 36
=> 2(x + 4) = 24
=> x + 4 = 12
=> x = 8
vậy_