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\(\frac{2}{3}x\frac{4}{y}=\frac{4}{45}:\frac{1}{5}\)\(=\frac{4}{15}\)
\(\frac{4}{y}=\frac{4}{15}:\frac{2}{3}\)\(=\frac{2}{5}\)
y=4:\(\frac{2}{5}\) y=10
\(\frac{3}{4}x\frac{y}{5}=\frac{15}{4}\)
\(\frac{y}{5}=\frac{15}{4}:\frac{3}{4}=5\)
y=5x5=25
a: =>y-7/10=4/10
=>y=11/10
b: \(\Leftrightarrow y\cdot\dfrac{4}{9}=\dfrac{3}{2}\)
hay y=27/8
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
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
a/\(\dfrac{19}{20}-y=\dfrac{8}{5}-\dfrac{3}{4}\)
\(\dfrac{19}{20}-y=\dfrac{17}{20}\)
\(y=\dfrac{19}{20}-\dfrac{17}{20}\)
\(y=\dfrac{2}{20}=\dfrac{1}{10}\)
b/\(y:\dfrac{2}{3}=\dfrac{4}{9}\times3\)
\(y:\dfrac{2}{3}=\dfrac{4}{3}\)
\(y=\dfrac{4}{3}\times\dfrac{2}{3}\)
\(y=\dfrac{8}{9}\)
#データネ
a) 19/20 - y = 8/5 - 3/4
19/20 - y = 17/20
y = 17/20 + 19/20
y = 36/20
b) y : 2/3 = 4/9 x 3
y : 2/3 = 12/9
y = 12/9 x 2/3
y = 24/27
tích cho mik nhaaaaaaaaaaa
a) \(y\times\dfrac{3}{4}=\dfrac{2}{5}\)
\(y=\dfrac{2}{5}:\dfrac{3}{4}\\ y=\dfrac{8}{15}\)
b) \(y:\dfrac{2}{3}-\dfrac{2}{5}=\dfrac{7}{8}\)
\(y:\dfrac{2}{3}=\dfrac{7}{8}+\dfrac{2}{5}\\ y:\dfrac{2}{3}=\dfrac{51}{40}\\ y=\dfrac{51}{40}\times\dfrac{2}{3}\\ y=\dfrac{17}{20}\)
\(x+\frac{3}{5}=\frac{4}{5}\)
\(\Rightarrow x=\frac{4}{5}-\frac{3}{5}\)
\(\Rightarrow x=\frac{1}{5}\)
\(y-\frac{1}{3}=\frac{1}{2}\)
\(\Rightarrow y=\frac{1}{2}+\frac{1}{3}\)
\(\Rightarrow y=\frac{5}{6}\)
Kết luận : \(x\times y=\frac{1}{5}\times\frac{5}{6}=\frac{5}{30}=\frac{1}{6}\)
* x + 3/5 = 4/5
x = 4/5 - 3/5
x = 1/5
* y - 1/3 = 1/2
y = 1/2 + 1/3
y = 5/6
Vậy x nhân y = 1/5 x 5/6 =1/6
y x \(\frac{2}{3}\)=\(\frac{4}{5}\)x \(\frac{3}{4}\)
y x \(\frac{2}{3}\)= \(\frac{3}{5}\)
y = \(\frac{3}{5}\): \(\frac{2}{3}\)
y = \(\frac{9}{10}\)
#HỌCTỐT#
y x 2/3 = 3/5
y = 3/5 : 2/3
y = 9/10