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12 x X = 123 x 123 + 409
12 x X = 15129 + 409
12 x X = 15538
X = 15538 : 12
X = \(\dfrac{7769}{6}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
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
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\(x\cdot12+95=229\)
\(x\cdot12=229-95\)
\(x\cdot12=134\)
\(x=134:12\)
\(\Rightarrow x=\frac{67}{6}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) X x 12 + 95 = 299
X x 12 = 299 - 95
X x 12 = 204
X = 204 : 12
X = 17
b) X x 32 = 45 x X
→ X \(\in\Phi\)
Đúng 100% nha, mk học lớp 6 rồi mà
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125 \(\times\) y - 12 \(\times\)y - 13 \(\times\) y = 5208000
y \(\times\)( 125 - 12 - 13) = 5208000
y \(\times\) 100 = 52008000
y = 5208000 : 100
y = 52080
![](https://rs.olm.vn/images/avt/0.png?1311)
a: 2/3=12/x
=>12/x=2/3
hay x=18
b: =>x/12=2/3
hay x=8
c: =>1/x=1/4
hay x=4
d: =>x/125=2/5
nên x=50
a, \(\dfrac{12}{18}=\dfrac{12}{x}\Rightarrow x=18\)
b, \(\dfrac{24}{36}=\dfrac{3x}{36}\Rightarrow3x=24\Leftrightarrow x=8\)
c, \(\dfrac{14}{56}=\dfrac{14}{14x}\Rightarrow14x=56\Leftrightarrow x=4\)
d, \(\dfrac{x}{125}=\dfrac{50}{125}\Rightarrow x=50\)
![](https://rs.olm.vn/images/avt/0.png?1311)
125 \(\times\) y - 12 \(\times\) y - 13 \(\times\) y = 5208000
y \(\times\) ( 125 - 12 - 13) = 5208000
y \(\times\) 100 = 5 208 000
y = 5 208 000 : 100
y = 52 080
\(x\cdot409=86265\)
\(x=86265:409\)
\(x=\frac{86265}{409}\)
\(x\cdot12+95=239\)
\(x\cdot12=144\)
\(x=144:12\)
\(x=12\)
\(89658:x=293\)
\(x=896568:293\)
\(x=\frac{89658}{293}\)
\(x:125=130\)
\(x=125\cdot130\)
\(x=16250\)
\(66178:x=326\)
\(x=203\)
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