Viết sai đề rùi nha bn
Đề đây, mk giải lun
(x-1)/13-(2x-13)/15=(3x-15)/27-(4x-27)/29
<=>15(x-1)/195-13(2x-13)/195=3(x-5)/27-4x-27/29
<=>15x-15-26x+169/195=29(x-5)/261-9(4x-27)/261
<=>-11+154/195=29x-145-36x+243/261
<=>-11x+154/195=-7x+98/261
<=>(11x+154)261=195(7x+98)
<=>2871x=-21084
<=>x=-14
Vậy x= -14
Giúp mình với nha !
1 tìm x
a , 231 - (x-6 ) =1339:13
b, 4 x -7 =3 .( 1568 - 3x ) - 2566
c, 294 = 6 .( x +15 )
d , 936 - ( 4x + 24 ) =72
Chứng minh rằng
a) (81^7-27^9-9^13) chia hết cho 15
1)tim x bit a)(1/2-1/3).6^x+6^x+2=6^15+6^18
b)3^x+3^x+2=2430
c)(2x-15)^5=(2x-15)^3
2) so saanh a)2^11 va 5^35
b)2^31 va 3^21
c)2^15 va 27^5.49^8 d)21^15 va 27^5.49^8
tính nhanh
\(\dfrac{3^6.45^4-15^{13}:5^9}{27^4.25^3+45^6}\)
tính hợp lý \(\dfrac{3^{^{^{ }}6}.45^5-15^{13}:5^9}{27^4.25^3+45^6}\)
chứng minh rằng : \(27^{10}+3^{29}+9^{14}\) chia hết cho 13
A=\(\dfrac{2^{30}\cdot5^7+3^{13}\cdot5^{27}}{2^{27}\cdot5^7+2^{10}\cdot5^{27}}\)
M=\(\left(x-4\right)^{\left(x-5\right)^{\left(x-6\right)^{\left(x+6\right)^{\left(x+5\right)}}}}\) tại x=7
tìm x :
(19/9-15/2135:9/4270):x=222/333.2121/4040:132132/660660
x-1/27=-3/1-x
Tính :
\(\dfrac{2^{29}.27^{13}}{3^{65}.81^5}\)
