Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(19,96+4,19-24,15:\left(x:\frac{1}{4}-\frac{1}{4}\right)=23,15\)
\(24,15-24,15:\left(x:\frac{1}{4}-\frac{1}{4}\right)=23,15\)
\(24,15:\left(x:\frac{1}{4}-\frac{1}{4}\right)=1\)
\(x:\frac{1}{4}-\frac{1}{4}=24,15\)
\(4x=24,4\)
\(x=6,1\)
\(\text{Bài này cx đơn giản thôi!}\)
\(4.19-24.15:\left(x:\frac{1}{4}-\frac{1}{4}\right)=23.15-19.96\)
\(4.19-24.15:\left(x:\frac{1}{4}-\frac{1}{4}\right)=3.19\)
\(24.15:\left(x:\frac{1}{4}-\frac{1}{4}\right)=4.19-3.19\)
\(24.15:\left(x:\frac{1}{4}-\frac{1}{4}\right)=1\)
\(x:\frac{1}{4}-\frac{1}{4}=24.15:1\)
\(x:\frac{1}{4}-\frac{1}{4}=24.15\)
\(x:\frac{1}{4}=24.15+\frac{1}{4}\)
\(x:\frac{1}{4}=24.4\)
\(x=24.4.\frac{1}{4}\)
\(x=6.1\)
a) 187 - {[497 - ( 8 x X + 11) : X] : 3 - 78} = 150
=> {[497 - ( 8 x X + 11) : X] : 3 - 78} = 187 - 150
=> {[497 - (8 x X + 11) : X] : 3 - 78} = 37
=> [497 - (8 x X +11): X ] : 3 - 78 = 37
=> [497 - (8 x X + 11) : X] : 3 = 115
=> 497 - ( 8 x X + 11) : X = 345
=> (8 x X + 11) : X = 497 - 345 = 152
=> 8X + 11 = 152X
=> 152X - 8X = 11
=> 144X = 11
=> X = 11/144
b) 19,96 + 4,19 - 24,15 : \(\left(x:\frac{1}{4}-\frac{1}{4}\right)=23,15\)
=> 19,96 + 4,19 - 24,15 : \(\left(x\cdot4-\frac{1}{4}\right)=23,15\)
=> 24,15 - 24,15 : \(\left(x\cdot4-\frac{1}{4}\right)\)= 23,15
=> 24,15 : \(\left(x\cdot4-\frac{1}{4}\right)\)= 1
=> \(x\cdot4-\frac{1}{4}=24,15\)
=> \(x\cdot4=24,15+\frac{1}{4}=24,4\)
=> x = 24,4 : 4 = 6,1
Còn câu c tương tự
a)73+86+968+914+3032
= (86 + 914) +(968 + 3032) + 73
= 1000 + 4000 + 73
= 5073
b)341.67+341.16+659.83
=341 (67 + 16) + 659 * 83
= 341 * 83 + 659 * 83
= (341+ 659) * 83
= 1000 * 83
= 830000
c)252-84:21+7
= 252 - 2 +7
=257
d)4.8.25.125.27
= (8 * 125) (4* 25) * 27
= 1000 * 100 * 27
= 2700000
e)34+35+36+37-24-25-26-27
= (34-24) + (35-25) + (36-26) + (37-27)
= 10 + 10 + 10 + 10
= 40
g)1-2+3-4+...-98+99
= (1 + 99) + (-2-98) + .....+ (-48 - 52) + (49 + 51) - 50
= 100 - 50
= 50
h)1-4+7-10+...-100+103
Bài 2:Tìm số nguyên x,biết:
l)3636:(12.x-91)=36
3636 : (12x - 91) = 36
12x - 91 = 101
12x = 192
x= 16
m)(x:23+45).67=8911
x: 23 + 45 = 133
x : 23 = 88
x= 88/23
n)[(6.x-39):7].4=12
6x - 39 = 3
6x = 42
x=7
p)128-3(x+4)=23
3(x+4) = 105
x+4= 35
x= 31
q)[(4.x+28).3+55]:5=35
(4x + 28)*3 +55 = 175
(4x + 28) * 3 = 120
4x + 28 = 40
4x = 12
x=3
r)123-5.(x+4)=38
5(x+4) = 85
x+4 = 17
x= 13
t)11-(53+x)=97
53 + x = -86
x= -139
i)23.75+25.23+180
= 23(75+25) + 180
= 2300 + 180
= 2480
1. Tìm x biết:
a) 15 – ( 4 – x) = 6
4-x=15-6
4-x=9
x=4-9
x=-5
b) - 30 + ( 25 – x) = - 1
25-x=-1-(-30)
25-x=29
x=25-29
x=-4
c) x – ( 12 – 25) = -8
x+13=-8
x=-8-13
x=-21
d) ( x – 29 ) – ( 17 – 38 ) = - 9
(x-29)-(-21)=-9
(x-29)=-9-21
x-29=-30
x=-30+29
x=-1
2. Tìm số nguyên x biết:
a) x – 5 = - 1
x=-1+5
x=4
b) x + 30 = - 4
x=-4-30
x=-34
c) x – ( - 24) = 3
x+24=3
x=3-24
x=-21
d) 22 – ( - x ) = 12
22+x=12
x=12-22
x=-10
e) ( x + 5 ) + ( x – 9 ) = x + 2
x+5+x-9=x+2
x+x-x=2-5+9
x=6
f) ( 27 – x ) + ( 15 + x ) = x – 24
27-x+15+x=x-24
-x+x+x=-24-27-15
x=-66
3. Tìm x biết:
a) 461 + (x - 45) = 387
x-45=387-461
x-45=-74
x=-74+45
x=-29
b) 11 - (-53+ x ) = 97
-53+x=11-97
-53+x=-86
x=-86-(-53)
x=-33
c) - ( x + 84) + 213 = -16
-(x+84)=-16-213
-(x+84)=-229
x+84=229
x=229-84
x=145
Ta có:
\(\frac{x-2}{255}=\frac{114}{153}\)
\(\Rightarrow\left(x-2\right).153=114.255\)
\(\Rightarrow\left(x-2\right).153=29070\)
\(\Rightarrow x-2=29070:153\)
\(\Rightarrow x-2=190\)
\(\Rightarrow x=190+2\)
\(\Rightarrow x=192\)
Vậy x = 192
\(\frac{x-2}{255}=\frac{114}{153}\)
\(\Rightarrow\left(x-2\right).153=255.114\)
\(\Rightarrow\left(x-2\right).153=29070\)
\(\Rightarrow x-2=29070:153\)
\(\Rightarrow x-2=190\)
\(\Rightarrow x=190+2=192\)
Vậy \(x=192\)
k mk nhé
*19,96+4,19-24,15:(1/4-1/4) *252/x=84/97
=19,96+4,19-24,15:0 x=252x97:84
=19,96+4,19-0 x=291
=24,15-0 * x-2/255=114/153
=24,15 x-2/255=38/51
x=38/51+2/255
x=64/85
a ) ko rõ đề
b )\(\frac{252}{x}=\frac{84}{97}\)
=> 252 . 97 = x . 84
=> x . 84 = 24 444
x = 24 444 : 84
x = 291
Vậy x = 291
c ) x - \(\frac{2}{255}=\frac{114}{153}\)
x = 114/153 + 2/255
x = 64/85
Vậy x = 64/85