x + 25 x 4 = 1000
500 x 6 + 500 x 4 - 108 :12 : 9
9782 x 35 - 9782 x 25 + 1000 : 5 :2
37800 : 25 : 4 + 57 + 467 x 43
500x6+500x4-108:12:9
=500x(6+4)-9:9
=500x10-1
=5000-1
=4999
9782x35-9782x25+1000:5:2
=9782x(35-25)+200:2
=9782x10+100
=97820+100
=97920
37800:25:4+57+467x43
=1512:4+57+20081
=378+57+20081
=435+20081
=20516
1,
a, 20,2 x 5,1 - 30,3 x 3,4 + 14,58
14,58 x 460 + 7,29 + 540 x 2
b, 1/1000 + 13/1000 + 25/1000 + ...+ 97/1000 + 109/1000
2,
a, 6/8 = 15/x
b, (x+1) + (x + 4) + (x + 7) + ... + (x + 28) - 155
c, 71 + 65 x 4 = y + 140/y +260
a.1 là phân số nhé. Các bạn giúp mình với mình đang cần gấp
25 x (1000 x 1000)
25 x (1000 x 1000)
= 25 x 1000000
= 25000000
x*78+x*25=1000
\(x\) \(\times\) 78 + \(x\) \(\times\) 25 = 1 000
\(x\) \(\times\) ( 78 + 25) = 1000
\(x\) \(\times\) 103 = 1000
\(x\) = 1000 : 103
\(x\) = \(\dfrac{1000}{103}\)
78x + 25x = 1000
<=> 103x = 1000
<=> x=\(\dfrac{1000}{103}\)
a 989898/454545 - 31313131/15151515
b 10101x < 5/10101 + 5/20202 + 5/30303 + 5/40404
c 1/1000 + 13/1000 + 25/1000 + 37/1000 + 49/1000 + ..........+ 87/1000 + 99/1000.
d 2006/2008 x 2001/2004 x 2008/2002 x 2004/2006 x 1001/2001
a=\(\frac{1}{9}\)
c=\(\frac{3069}{500}\)
Tìm x
A. (x+3)3=1000
B. (x+1)2=25
C. (x-7)4=16
D. ( x - 3 ) 4 = 81
A. (x+3)3=1000
=>(x+3)3 = 103
=> x + 3 = 10
=> x = 7
a. (x + 3)3 = 1000
=> (x + 3)3 = 103
=> x + 3 = 10
=> x = 7
b. (x + 1)2 = 25
=> (x + 1)2 = (-5)2 = 52
=> x + 1 = -5 hoặc x + 1 = 5
=> x = -6 hoặc x = 4
c. (x - 7)4 = 16
=> (x - 7)4 = (-2)4 = 24
=> x - 7 = -2 hoặc x - 7 = 2
=> x = 5 hoặc x = 9
d. (x - 3)4 = 81
=> (x - 3)4 = (-3)4 = 34
=> x - 3 = -3 hoặc x - 3 = 3
=> x = 0 hoặc x = 6
1. Tìm x để A = 2007 - 48/X+2 có giá trị bé nhất
2. Tính nhanh: B=1/1000+13/1000+25/1000+37/1000+....+85/1000+97/1000
Câu 8
a,1000:(x x 25)=8 b,(x:30)x8=8x1350
\(1000:\left(x\times25\right)=8\\ x\times25=1000:8\\ x\times25=25\\ x=25:25=1\)
_______________
\(\left(x:30\right)\times8=8\times1350\\ \left(x:30\right)\times8=10800\\ x:30=10800:8\\ x:30=1350\\ x=1350\times30\\ x=40500\)
x x 25 = 1000 :8
x x 25 = 125
x = 125 : 25
x = 6
(x:30)x8= 10800
x : 30 = 10800 : 8
x : 30 = 1350
x = 1350 x 30
x = 40500
\(a,1000:\left(x\times25\right)=8\)
\(\Leftrightarrow x\times25=1000:8\)
\(\Leftrightarrow x\times25=125\)
\(\Leftrightarrow x=125:5\)
\(b,\left(x:30\right)\times8=8\times1350\)
\(\Leftrightarrow x:30=10800:8\)
\(\Leftrightarrow x:30=1350\)
\(\Leftrightarrow x=1350\times30\)
\(\Leftrightarrow x=40500\)
\(\Leftrightarrow x=25\)
57,3 - 25/10 x 9,32 + 4264/1000 - 2,5 x 68%