tìm x
x×409=86265
x×12+95=239
89658:x=293
x:125=130
66178:x=326
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(1+1+1+.............+1+1):50+2010-12xX=91
(1x50):50+2010-12xX
50:50+2010-12xX=91
1+2010-12xX=91
2011-12xX=91
12xX=2011-91
12xX=1920
x=1920:12
x=160
12 x X = 123 x 123 + 409
12 x X = 15129 + 409
12 x X = 15538
X = 15538 : 12
X = \(\dfrac{7769}{6}\)
\(\frac{x+2}{327}+\frac{x+3}{326}+\frac{x+4}{325}+\frac{x+5}{324}+\frac{x+349}{5}=0\)
\(\Leftrightarrow\frac{x+2}{327}+1+\frac{x+3}{326}+1+\frac{x+4}{325}+1+\frac{x+5}{324}+1+\frac{x+324}{5}+1+\frac{25}{5}=5\)
\(\Leftrightarrow\frac{x+329}{327}+\frac{x+329}{326}+\frac{x+329}{325}+\frac{x+329}{324}+\frac{x+329}{5}=0\)
\(\Leftrightarrow\left(x+329\right)\left(\frac{1}{327}+\frac{1}{326}+\frac{1}{325}+\frac{1}{324}+\frac{1}{5}\right)=0\)
Vì: \(\frac{1}{327}+\frac{1}{326}+\frac{1}{325}+\frac{1}{324}+\frac{1}{5}\ne0\)\(\)
\(\Rightarrow x=-329\)
x - 25 = 85
x = 85 + 25
x = 110
x + 45 = 80
x = 80 - 45
x = 35
x - 12 = 95
x = 95 + 12
x = 107
x + 25 = 125
x = 125 - 25
x = 100
x - 85 = 452
x = 452 + 85
x = 537
x + 52 = 96
x = 96 - 52
x = 44
A . 3636 : ( 12 x X - 91 ) = 36
( 12 x X - 91 ) = 3636 : 36
( 12 x X - 91 ) = 101
12 x X = 101 + 91
12 x X = 192
X = 192 : 12
X = 16
B . (X: 22+ 45) x67= 8911
(X: 22+ 45) = 8911 : 67
(X: 22+ 45) = 133
X: 22 = 133 - 45
X: 22 = 88
X = 88 x 22
X = 1936
C . (X +74) -318= 200
X + 74 = 200 + 318
X + 74 = 518
X = 518 - 74
X = 444
D . 5x X- 18 = 8+9
5x X - 18 = 17
5x X = 17 + 18
5x X = 35
X = 35 : 5
X = 7
L . 1440: (125- X) =12
125 - X = 1440 : 12
125 - X = 120
X = 125 - 120
X = 5
K MÌNH NHA !!!
a) 35.(x-10)=35
x-10= 35:35
x-10= 1
x= 1+10
x= 10
b) 21.(32-x) =21
32-x = 21:21
32-x = 1
x= 32-1
x= 31
A=[(38+17)+125]+29
A=175+29
A=204
B=312.3
B=936
C=1+1+1+1+1
C=5
D=(125:5).(36:9)
D=25.4
D=100
\(x\cdot409=86265\)
\(x=86265:409\)
\(x=\frac{86265}{409}\)
\(x\cdot12+95=239\)
\(x\cdot12=144\)
\(x=144:12\)
\(x=12\)
\(89658:x=293\)
\(x=896568:293\)
\(x=\frac{89658}{293}\)
\(x:125=130\)
\(x=125\cdot130\)
\(x=16250\)
\(66178:x=326\)
\(x=203\)
tìm x
x×409=86265
x = 86265 : 409
x = 86265/409
x×12+95=239
x × 12 = 239 - 95
x × 12 = 144
x = 144 : 12
x = 12
89658:x=293
x = 89658 : 293
x = 306
x:125=130
x = 130 × 125
x = 16 250
66178:x=326
x = 66178 : 326
x = 203