1) \(x^{15}=x\Leftrightarrow\hept{\begin{cases}x=0\\x=1\end{cases}}\)
1) \(x^{15}=x\Leftrightarrow\hept{\begin{cases}x=0\\x=1\end{cases}}\)
a, 5x - 10 . ( - 7 ) = 15 .( - 3 )
b, 2x + 12 = - 8
c, 3x - 5 = - 20
d, 2x - ( - 12 ) = ( - 8 ) . 23
e, x mu 2 = 49
i, ( x - 2 ) mu 2 + 1 = 65
g , 2. ( x - 3 ) mu 2 - 5 = 5 . ( - 3 ) mu 2
(2 x - 15 ) mu 5 =(2x-15) mu 3
B1) Tinh
a) 245-4 . [15: 8 +2.(4+3 mu 2 -9)]
b) 375: 5 mu 3 -( 3 mu 8: 3 mu 6 -2 .2 mu 3)
B2: Tim x
a) 2x -2 mu 3 .3 mu 2=138
b) ( 6x- 3 mu 4) . 7 mu 3= 3 . 7 mu 4
c) 1+2+3+..............+x =500500
bai 3 tim x , biet;
a, 3 mu x =81 b, 2 mu x-3=16 c, 5 mu 2x-3=25 d, [x-1]mu 5=32 e, [2x+3]mu 2 =49 f, 2[5-x]mu 2=49
( 3x -1) mu 5 = 32
9 x - 1 ) mu 2 = ( 2x - 3 ) mu 2
708-3:(x+3 mu 1)=407
2.x+15=134:2
114-2.(2x+11)=80
12.x-33=3 mu 2. 3 mu3
200-8.(2.x+7)=112
2 mu 4:(x+1)+2=6
2448-(5.x+148)=2. 10 mu 3
125:x+100=125
2.x-138=8.9
145-x=98+32
Giup em giai nhung bài nay ho a
( x - 1 ) mu 2 : 5 mu 21 = 25 mu 30 . 5
2.3 mu x + 1 = 10.3 mu 12 + 8 : 27 mu 4
( 19x + 2 .5 mu 2) : 14 = ( 13 - 8 ) mu 2
1351 - 2 . ( x + 3) = 4 mu 12 : 8 mu 7 + 3
mong m.n giup mk vs !!!!
HELP ME PLS :( GIÚP tìm X (2x-15) mũ 5 = (20 -13) mu 3
bai 1 : tim x E n biet
a ( 9 + 8 )x + 16 . 2x = 98
b 37.5 mu x - 12. 5 mu x = ( 125 mu 2 )mu 3
c [27 + 5(x - 4 ) ] chia het cho 9
d 90 chia het cho x, 150 chia het cho x va 5<x<30
e x chia het 48, x chia het 36 va x< 500
f x chia het 60, x chia het 42, va 840<x<2500
g 45 chia het 2x + 1
h ( x +16 ) chia het ( x +15 )
k ( 2 x + 7 ) chia het ( x - 1 )
m ( 3x + 27 ) chia het (2x + 3)
n 326 chia cho x du 11 con 553 chia x du 13