Tìm y :
yx3+y:2= 110
Tìm y biết yx3+y/2+y/4=1 1/2:y
Help me!
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
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Tìm y: 7xy+y-yx3+5xy=7800
Yx(7+1-3+5)=7800
Yx10=7800
Y=7800:10
Y=780
tìm y
yx3 1/2=4 3/4
y:2 2/3=4 1/3
Bài 4 tìm y
Yx3=246-12
Y:3+5=215
yx3=246-12
yx3=234
y=234:3
y=78
y:3+5=215
y:3=215-5
y:3=210
y=210x3
y=630
y x 3= 246 - 12
3y= 246 -12
3y= 234 = 78
y= 78
+) \(Y\times3=246-12\)
\(Y\times3=234\)
\(Y=78\)
+) \(Y:3+5=215\)
\(Y:3=210\)
\(Y=630\)
Cho x+y =1 và xy khác 0. Chứng minh rằng xy3−1−yx3−1+2(x−y)x2y2+3=0xy3−1−yx3−1+2(x−y)x2y2+3=0.
Tìm y: (372+300):(Yx3)=8
Yx7+Yx3 = 60. tìm Y
Yx7+Yx3 =60
Y x (7+3)=60
Yx10=60
Y=60:10
Y=6
Y x 7 + Y x 3 = 60
Y x (7 + 3) = 60
Y x 10 = 60
Y = 60 : 10
Y = 6
tìm y biết 42-yx3=30
Bài 6: ( Đề 1) Tìm y
a) \(3\dfrac{1}{5}:2\dfrac{1}{3}:y=\dfrac{12}{7}\) b) \(3:yx3\dfrac{1}{2}=\dfrac{2}{3}x\dfrac{3}{4}\) c) \(3\dfrac{2}{3}-y+1\dfrac{3}{4}=2\)
` 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`