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\(37\times y+64\times y-y=9000\)
\(y\times\left(37+64-1\right)=9000\)
\(y\times100=9000\)
\(y=90\)
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y x 4 + y x 6 = 1850
y x ( 4 + 6 ) = 1850
y x 10 = 1850
y = 1850 : 10
y = 185
y x 125 - y x 25 = 9000
y x ( 125 - 25 ) = 9000
y x 100 = 9000
y = 9000 : 100
y = 90
* y x 4 + y x 6 = 1850
y x (4 + 6) = 1850
y x 10 = 1850
y = 1850 : 10 = 185
* y x 125 - y x 25 = 9000
y x (125 - 25) = 9000
y x 100 = 9000
y = 9000 : 100 = 90
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a ) 18 x 10 = 180
18 x 100 = 1800
18 x 1000 = 18000
82 x 100 = 8200
75 x 1000 = 75000
19 x 10 = 190
256 x 1000 = 256000
302 x 10 = 3020
400 x 100 = 40000
b ) 9000 : 10 = 900
9000 : 100 = 90
9000 : 1000 = 9
6800 : 100 = 68
420 : 10 = 42
2000 : 1000 = 2
20020 : 10 = 2002
200200 : 100 = 2002
2002000 : 1000 = 2002
a)18 x 10 = 180
18 x 100 = 1 800
18 x 1000 = 18 000
82 x 100 = 8 200
75 x 1000 = 75 000
19 x 10 = 190
256 x 1000 = 256 000
302 x 10 = 3 020
400 x 100 = 40 000
b)9000 : 10 = 900
9000 : 100 = 90
9000 : 1000 = 9
6800 : 100 = 68
420 : 10 = 42
2000 : 1000 = 2
20 020 : 10 = 2 002
200 200 : 100 = 2 002
2 002 000 : 1000 = 2 002
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x + 3000 = 800 + 9000
x + 3000 = 9800
x = 9800 - 3000
x = 6800
x + 3000 800 + 9000
x + 3000 = 9800
x = 9800 - 3000
x = 6800
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![](https://rs.olm.vn/images/avt/0.png?1311)
x - 6400 = 9000 - 3000
x - 6400 = 3000
x = 3000 + 6400
x = 9400
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900x900+9000=x+700
=> 819000 =x + 700
=> x + 700 = 819000
=> x = 819000 - 700
=> x = 818300
900.900+9000=x+700
810000+9000=x+700
819000=x+700
x=819000-700
x=818300
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\(4860+y\times12=9000\)
\(y\times12=9000-4860\)
\(y\times12=4140\)
\(y=4140\div12\)
\(y=345\)
Vậy \(y=345\)
\(4860+y\times12=9000\)
\(y\times12=9000-4860\)
\(y\times12=4140\)
\(y\) \(=4140\div12\)
\(y\) \(=345\)