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Hiệu x – y | 432 | 308 | 602 | 2000 | 2345 |
Tỉ số x : y | 4:1 | 2:1 | 6:3 | 5:3 | 7:2 |
x | 576 | 616 | 1206 | 5000 | 3283 |
y | 144 | 308 | 603 | 3000 | 938 |
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= \(y\) x ( 2+3+5)= 1500
= y x 10 = 1500
y = 1500 : 10
y = 100
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`1716:y=12xx13`
`1716:y=156`
`y=1716:156`
`y=11`
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`y xx 2/3+y xx 1/6=10/3`
`y xx(2/3+1/6)=10/3`
`y xx(4/6+1/6)=10/3`
`y xx5/6=10/3`
`y=10/3:5/6`
`y=10/3xx6/5=4`
1716 : y = 12 \(\times\) 13
1716 : y = 156
y = 1716 : 156
y = 11
\(y\times\dfrac{2}{3}+y\times\dfrac{1}{6}=\dfrac{10}{3}\)
\(y\times\left(\dfrac{2}{3}+\dfrac{1}{6}\right)=\dfrac{10}{3}\)
\(y\times\dfrac{5}{6}=\dfrac{10}{3}\)
\(y=\dfrac{10}{3}:\dfrac{5}{6}\)
\(y=4\)
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y x 3 + y x 5 + y x 2 = 900
y x ( 3 + 5 + 2 ) = 900
y x 9 = 900
y = 900 : 9
y = 100
Vậy y = 100
y x 3 + y x 5 + y x 2 = 900
y x ( 3 + 5 + 2 ) = 900
y x 10 = 900
y = 900 / 10
y = 90
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\(y.\left(1+2+3\right)=36\)
\(y.6=36\)
\(y=36:6\)
\(y=6\)
Chú ý: dấu . là nhân
y x 1 + y x 2 + y x 3 = 36
y x ( 1 + 2 +3 ) = 36
y x 6 = 36
y = 36 : 6
y = 6
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\(y\times\dfrac{18}{5}-y\times\dfrac{3}{5}=2\\ y\times\left(\dfrac{18}{5}-\dfrac{3}{5}\right)=2\\ y\times3=2\\ y=2:3\\ y=\dfrac{2}{3}\)
TL:
y x 3 + 2 x y - y = 516
y x 3 + 2 x y - y x 1 = 516
y x (3 + 2 - 1) = 516
y x 4 = 516
y = 516 : 4
y = 129
HT
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y x 3 + 2 x y - y = 516
y x 3 + 2 x y - y x 1 = 516
y x ( 3 + 2 + 1 ) = 516
y x 4 = 516
y = 516 : 4
y = 129
HT
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