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3/5 x y + 1/2 : 5/3 - 5/4 = 1/2 x 1/3
3/5xy +3/10 -5/4 =1/6
3/5xy=1/6 -3/10+5/4=67/60
y= 67/60:3/5=67/36
\(5\times y=2\\ y=2:5\\ y=0,4\) \(\dfrac{8}{5}-y=\dfrac{1}{3}\\ y=\dfrac{8}{5}-\dfrac{1}{3}\\ y=\dfrac{23}{15}\)
a) y = 5/14 : 6/7
y = 5/12
vậy y = 5/12
b) y = 4/9 x 2/3
y = 8/27
vậy t = 8/27
c) y = 1/2 - 3/10
y = 1/5
vậy y = 1/5
d) y = 5/6 - 1/3
y = 1/2
vậy y = 1/2
a) y × 2/5 + y × 3/5 = 5/7
y x ( 2/5 + 3/5) = 5/7
y x 5/5 = 5/7
y x 1 = 5/7
y = 5/7 : 1
y = 5/7
b) y × 7/2 - y × 3/2 = 3/4
y x ( 7/2 - 3/2) = 3/4
y x 4/2 = 3/4
y x 2 = 3/4
y = 3/4 : 2
y = 3/4 x 1/2
y = 3/8
`a,yxx(2/5+3/5)=5/7`
`y xx1=5/7`
`y=5/7:1`
`y=5/7`
`b,y xx(7/2-3/2)=3/4`
`y xx2=3/4`
`y =3/4:2`
`y=3/2`
a) y + 3/7 x 21/9 = 5
y + 3/7 x 7/3 = 5
y + 1 = 5
y = 4
b) y x 3/5 - 1/2 = 4/5
y x 3/5 = 4/5 + 1/2
y x 3/5 = 13/10
y = 13/6
c) 9/8 - y + 2/5 = 1/4
y - 2/5 = 9 /8 - 1/4
y - 2/5 = 7/8
y = 51/40
d) y - 6/5 : 2/3 = 5/6
y - 9/5 = 5/6
y = 79/30
e) y : 7/8 + 3/4 = 7/4
y : 7/8 = 1
y = 7/8
3/5*y-4/5:3+1/12=3/2+1/5
3/5*y-4/5:3+1/12=17/10
3/5*y-4/15=17/10-1/12
3/5*y-4/15=97/60
3/5*y=97/60+4/15
3/5*y=113/60
y=113/60:3/5
y=113/36 ( cho mik nha)
bài 1 :
\(\frac{5}{12}\) + \(\frac{1}{3}\) = \(\frac{5}{12}\) + \(\frac{4}{12}\) = \(\frac{5+4}{12}\) = \(\frac{9}{12}\) = \(\frac{3}{4}\)
1 - \(\frac{3}{4}\) = \(\frac{4}{4}\) - \(\frac{3}{4}\) = \(\frac{4-3}{4}\) = \(\frac{1}{4}\)
2 x \(\frac{3}{11}\) = \(\frac{2x3}{11}\) = \(\frac{6}{11}\)
\(\frac{8}{7}\): 4 = \(\frac{8}{7x4}\) = \(\frac{8}{28}\) = \(\frac{2}{7}\)
bài 2 :
\(\frac{2}{5}\) : y = \(\frac{1}{3}\)
y = \(\frac{2}{5}\) : \(\frac{1}{3}\)
y = \(\frac{6}{5}\)
y : \(\frac{7}{11}\) = 22
y = 22 x \(\frac{7}{11}\)
y = 14
ai thấy đúng tk nha
\(\dfrac{1}{2}:\dfrac{3}{5}-y=\dfrac{1}{3}\)
\(\dfrac{1}{2}x\dfrac{5}{3}-y=\dfrac{1}{3}\)
\(\dfrac{5}{6}-y=\dfrac{1}{3}\)
\(y=\dfrac{5}{6}-\dfrac{1}{3}\)
\(y=\dfrac{5}{6}-\dfrac{2}{6}\)
\(y=\dfrac{3}{6}=\dfrac{1}{2}\)
\(\dfrac{1}{2}:\dfrac{3}{5}-y=\dfrac{1}{3}\)
\(\dfrac{1}{2}\times\dfrac{5}{3}-y=\dfrac{1}{3}\)
\(\dfrac{5}{6}-y=\dfrac{1}{3}\)
\(y=\dfrac{5}{6}-\dfrac{1}{3}=\dfrac{5}{6}-\dfrac{2}{6}\)
\(y=\dfrac{3}{6}=\dfrac{1}{2}\)