Giúp mik vs Tìm x biết 12^4.x-3.x=145-225:51
tìm x
2 mũ 4.x - 3 mũ 2.x = 145 - 225 : 51
have me
\(2^4.x-3^2.x=145-225:51\)
\(16x-9x=145-\frac{75}{17}\)
\(7x=\frac{2390}{17}\)
\(x=\frac{2390}{119}\)
tk mình nhoa bạn
Ta có:
24.x-32.x=145-225:51
x(24-32)=145-225:51
Sai đề(225:51ko chia dc)
16.x-9.x=145-225:51 tìm x
Tìm x ,biết :
2^4 .x - 3^2 .x = 145 - 255 : 51
2^4 .x - 3^2 .x = 145 - 255 : 51
16.x - 9.x = 145 - 5
16.x - 9.x = 140
(16 - 9).x = 140
7x = 140
x = 140 : 7
x = 20
2^4 .x - 3^2 .x = 145 - 255 : 51
8x - 9x = 145 - 5
-x = 140
x = -140
24 . x - 32 . x = 145 - 255 : 51
16 . x - 9. x = 145 - 5
( 16 - 9 ). x = 140
7 . x = 140
x = 140 : 7
x = 20
Vậy x = 20
580:(x-24)=329-150:2
24 * x -32 * x = 145-225:51
5x + 1 = 625
580:(x-24)=329-150:2
=> 580:(x-24)=329-75
=> 580:(x-24)=254
=>x-24= 580:254
=> x = 290/127 + 24
=> x = 3338/127
+) 24 * x -32 * x = 145-225:51
=> x.(24 -32) = 145-225:51
=> x.7= 145-225:51
=> x.7= 2390/17
=> x= 2390/119
+) 5x + 1 = 625
=> 5x + 1 = 54
=> x+1 = 4
=> x = 3
tìm x biết: (4x-12)(x^3+64)=0
(3x-12)(x^2-4)=0
(x+3)^3:3-1=-10
(3x-1)^3-2=-66
m.n giúp mik vs tối mik phải nộp r ak
(4x-12)(x3+64)=0
=> [x3+64=0=>x=4x-12=0=>4x=12=>x=3 olm bị lỗi nên em đừng có viết cách ra 1 quãng như kia nhé !
vậy x thuộc {3;4}
(3x-12)(x2-4)=0
=>[x2-4=0=>x2=4=>x=2 hoặc x=-23x-12=0=>3x=12=>x=4
vậy x thuộc {4;2;-2}
(x+3)3:3-1=-10
(x+3)3:3=-9
(x+3)3=-9.3
=>(x+3)3=-27
=>x+3=-3
=>x=-6
(3x-1)3-2=-66
(3x-1)3=-64
(3x-1)3=-43
=>3x-1=-4
=>3x=-3
=>x=-1
\(\left(4x-12\right)\left(x^3+64\right)=0\)
\(\Leftrightarrow4x-12=0\)
\(\Leftrightarrow4x=0+12\)
\(\Leftrightarrow4x=12\)
\(\Leftrightarrow x=12\div4\)
\(\Leftrightarrow x=3\)
\(\Leftrightarrow x^3+64=0\)
\(\Leftrightarrow x^3=0=64\)
\(\Leftrightarrow x^3=\left(-64\right)\)
\(\Leftrightarrow x^3=\left(-4\right)^3\)
\(\Leftrightarrow x=\left(-4\right)\)
\(\Rightarrow x\in\left\{-4;3\right\}\)
\(\Leftrightarrow\left(3x-12\right)\left(x^2-4\right)=0\)
\(\Leftrightarrow3x-12=0\)
\(\Leftrightarrow3x=0+12\)
\(\Leftrightarrow3x=12\)
\(\Leftrightarrow x=12\div3\)
\(x=4\)
\(\Leftrightarrow x^2-4=0\)
\(\Leftrightarrow x^2=0+4\)
\(\Leftrightarrow x^2=4\)
\(\Leftrightarrow x^2=2^2=\left(-2\right)^2\)
\(\Rightarrow x\in\left\{2;-2\right\}\)
\(\Rightarrow x\in\left\{-2;2;4\right\}\)
Các câu khác tương tự nhé !
Giá trị nào dưới đây của x thỏa mãn 2 4 . x - 3 2 . x =145-225:51?
A. 20
B. 30
C. 40
D. 80
Tìm x, biết
A) 4 mũ x. 4=64
B)3 mũ x. 3 mũ 21
C) 5 mũ : 25= 5 mũ 27
D) 2 mũ x :16 =128
E) 2.3 mũ x =10.3 mũ 12+8.12 mũ 4
F) 2 mũ 4.x-3 mũ 2.x=145-255:51
Tìm y biết: 4/51 x y + y + y x 47/51 = 5/4 + 1/6.
Giúp mik với!
\(\dfrac{4}{51}\times y+y+y\times\dfrac{47}{51}=\dfrac{5}{4}+\dfrac{1}{6}\\y\times\left(\dfrac{4}{51}+1+\dfrac{47}{51}\right)= \dfrac{17}{12}\\ y\times2=\dfrac{17}{12}\\ y=\dfrac{17}{24}\)
Tìm x
a) 43 (x)=31
b)23 (4)=x(3)
c)145 (x)=145
GIÚP MIK VỚI!!!!!!!!!!!!!!!