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yx3+y/2+y/4=11/2:y
yx3+y:2+y:4=5,5:y
yx3+y:(2+4)=5.5:y
yx3+y:6=5,5:y
yx3+yx1/6=5,5:y
yx(3+1/6)=5,5:y
yx19/6=5,5:y
...........................
X-Yx3=Yx3+4,25
X-Yx3-Yx3=4,25
X-Yx(3-3)=4,25
X-Yx0=4,25
=> X=4,25
4,25-Y=2,25
Y=4,25-2,25
Y=2
Bai nay sao de vay?
x=y+2.25
<=> y+2.25 - 3y=3y+4.25
<=> 5y=-2
y=-0.4
x=1.85 bai nay ra am nha
` a/`
` 3 1/5 : 2 1/3 : y = 12/7 `
` 48/35 : y = 12/7 `
` y = 48/35 : 12/7 `
` y = 48/35 xx 7/12 `
` y = 4/5`
Vậy ` y = 4/5`
`b/`
` 3 : y xx 3 1/2 = 2/3 xx 3/4 `
` 3 : y xx 7/2 = 1/2`
` 3 : y = 1/2 : 7/2 `
` 3 : y = 1/2 xx 2/7 `
` 3 : y = 1/7 `
` y = 3 : 1/7 `
` y = 3 xx 7`
` y = 21 `
Vậy ` y = 21 `
`c/`
` 3 2/3 - y + 1 3/4 = 2`
` 11/3 - y + 7/4 = 2 `
` 11/3 -y = 2 - 7/4`
` 11/3 - y = 1/4 `
` y = 11/3 - 1/4 `
` y = 41/12 `
Vậy ` y = 41/12`
yx110-y:0,125-y:0,5=5,702
yx110-yx8-yx2 =5,702
yx(110-8-2) =5,702
yx100 =5,702
y =5,702:100
y =0,05702
\(y\times110-y:0,125-y:0,5=5,702\)
\(y\times110-y\times8-y\times2=5,702\)
\(y\times\left(110-8-2\right)=5,702\)
\(y\times100=5,702\)
\(y=5,702:100\)
\(y=0,05702\)
Vậy...............
\(y\text{×}5+y:0,25=81\)
\(y\text{×}5+y\text{×}4=81\)
\(y\text{×}\left(5+4\right)=81\)
\(y\text{×}9=81\)
\(y=81:9\)
\(y=9\)
\(y\text{×}3+y:0,2=64\)
\(y\text{×}3+y\text{×}5=64\)
\(y\text{×}\left(3+5\right)=64\)
\(y\text{×}8=64\)
\(y=64:8\)
\(y=8\)
y x 110 - y : 0,125 - y : 0,5 = 5,702
=>y x 110 - y x 8 - y x 2 = 5,702
=>y x ( 100 - 8 - 2 )= 5,702
=>y x 100 = 5,702
=> y = 5,702 : 100
=> y =0,05702
Vậy y = 0,05702
HOK TỐT
Ta có:
\(y\times110-y:0,125-y:0,5=5,702\)
\(\Leftrightarrow y\times110-y:\frac{1}{8}-y:\frac{1}{2}=5,702\)
\(\Leftrightarrow y\times110-y\times8-y\times2=5,702\)
\(\Rightarrow y\times\left(110-8-2\right)=5,702\)
\(\Rightarrow y\times100=5,702\)
\(\Rightarrow y=\frac{5,702}{100}\)
\(\Rightarrow y=0,05702\)
Vậy \(y=0,05702\)
#tippiecat
\(118,24-\left(y\cdot3+y:5\right)=54,24\)
=>\(\left(y\cdot3+y\cdot0,2\right)=118,24-54,24\)
=>\(y\cdot3,2=64\)
=>\(y=\dfrac{64}{3,2}=20\)
y x 3 + y : 2 = 110
y x 3 + y x 0,5 = 110
y x ( 3 + 0,5 ) = 110
y x 3,5 = 110
y = 110 : 3,5
y = ??????????