\(\left(x-3\right)^{23}=7\Rightarrow x-3=\log_{23}7\Leftrightarrow x=\log_{23}7+3\)
\(\left(x-3\right)^{23}=7\Rightarrow x-3=\log_{23}7\Leftrightarrow x=\log_{23}7+3\)
23/ 45 * 15/16 * 32/23 + 0,3 * x = 5 3/5 * 7 7/12 * 2/27 * 5/13
[ ( 35 5/7 + 2 3/4 ) - 5 5/7 + 1/4 ] : 11 + x = 3
giúp mình với
a)5. ( x + 35 ) = 515
b) (x+7):3=14c) 72:(x–15)=8
d) 19+(x+23)=50
e) (18–x) + 23 =29
f) 56–(x+14)=22g) (2x +1)–7=14
h) 3. (x+1)–32=67i) 70–5. (x–3)=45
j) 200–8. (2x+7)=112
k) 123–(x+4). 5 =38
Tính hợp lí (nếu có thể)
a, 21 x 23 - 3 x 7 x (-17)
b, 42x3-7x[(-34)+18]
c, 71x64+32x(-7)-13x32
d, 13x(23-17)-13x(23+17)
giúp mình vớiiiii
Tính nhanh: LƯU Ý tất cả số dưới đây đều là phân số
1,1/8 x 2/5 + 3/5 + 1/8
2,( -1)/15 x 2/5 + (-5)/3 x (-1)/13
3,4/9 : 11/6 + 5/9 x 6/11
4,5/19 x 7/13 + 7/19 x 8/13 - 3 x 7/19
5, 2/7 x 4/23 - 2/7 x 27/23 + 2/7
6,3/8 x 3/7 +3/8 x 4/7 + 11/8
7,-5/27 : 6/11 - 16/11 x 5/27 - 5/27
8, 5/16 x 7/8 - 5/16 x 1/8 + 10/8 :16/5
9,1/3 x 39/17 - 129/3 x 1/17
10,5/2 : 23/3 - 3/2 x 7/23
Tìm x
1.-9/46 - 4/1/23 : (3/1/4 - x : 3/5) + 2/8/23=1
2.(6/2/7 * x +3/7) : 2/1/5 - 3/7=-1
3.5/8/17 : x + (-1/17) : x + 3/1/17 : 17/1/3=4/17
4.1/1 * 4 + 1/4 * 7 + 1/7 * 10 + ...+ 1/x(x + 3)=6/19
Bài 7 : tìm X , biết
a) ( 1 + 3 + 5 + ....+ 97 + 99 ) - 2 x X = 500
b) X - 1234 = ( 175 x 2 - 50 x 7 ) : 23 + 23
tính nhanh
1. 2/3 + 4/9 + 1/5 + 2/15 +3/2 - 17/18
2. 13/28 x 5/12 - 5/28 x 1/12
3. 19/4 x 15/23 - 15/4 x 7/23 + 15/4 x 11/23
tính
a, 7/-25 + -18/25 + 4/23 +5/7+19/23
b, 7/19 x 8 /11 + 7/19 x 3/11 + 12/19
c ,day la hon so nha: 8 2/7 -(3 4/7 + 4 2/7 )
d, -7/9 .3/11 + -7 /9.8/11 + 1 7/9
tìm x thuộc z: 27/23+-4/23+1/2+-4/8<x<7/3+13/41+28/41
128 - 3 . (x + 4 ) = 23
(7 - x) - ( 25 + 7 ) = -25