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\(\dfrac{19}{20}-y=\dfrac{8}{5}-\dfrac{3}{4}\)
\(\Leftrightarrow\dfrac{19}{20}-y=\dfrac{32-15}{20}\)
\(\Leftrightarrow\dfrac{19}{20}-y=\dfrac{17}{20}\Leftrightarrow y=\dfrac{19}{20}-\dfrac{17}{20}=\dfrac{2}{20}=\dfrac{1}{10}\)
\(y:\dfrac{2}{3}=\dfrac{4}{9}.3\)
\(\Leftrightarrow y:\dfrac{2}{3}=\dfrac{12}{9}\Leftrightarrow y=\dfrac{12}{9}.\dfrac{2}{3}=\dfrac{8}{9}\)
\(a.\dfrac{19}{20}-y=\dfrac{17}{20}\)
\(y=\dfrac{2}{17}\)
\(b.y:\dfrac{2}{3}=\dfrac{4}{3}\)
\(y=\dfrac{8}{9}\)
(y:3)x8=8x3198
(y:3)x8=25584
y:3=25584:8
y:3=3198
y=3198x3
y=9594
y : 3 = 8 x 3198 : 8
y : 3 = 3198
y = 3198 x 3
y= 9594
Vậy y = 9594
Nhớ k cho mình nhé! Thank you!!!
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) \(y:\dfrac{2}{3}-\dfrac{2}{5}=\dfrac{7}{8}\)
\(y:\dfrac{2}{3}=\dfrac{7}{8}+\dfrac{2}{5}\\ y:\dfrac{2}{3}=\dfrac{51}{40}\\ y=\dfrac{51}{40}\times\dfrac{2}{3}\\ y=\dfrac{17}{20}\)
a, y x 8 = y + 10
=> 8y=y+10
=> 8y-y=10
=> 7y=10
=> y=10/7
b, y x 10 + 9 = y x 3 + 3
=> 10y+9=3y+3
=>10y+9-3y=3
=> 10y-3y+9=3
=> 10y-3y=3-9
=> 7y=-6
=> y=-6/7
:)
\(5\times y=2\\ y=2:5\\ y=0,4\) \(\dfrac{8}{5}-y=\dfrac{1}{3}\\ y=\dfrac{8}{5}-\dfrac{1}{3}\\ y=\dfrac{23}{15}\)
`7/2 : y= 3/8 + 5/4`
`=> 7/2 : y= 3/8 +10/8`
`=> 7/2 : y=13/8`
`=> y= 7/2 : 13/8`
`=> y= 7/2 xx 8/13`
`=> y= 28/13`
(y:3).8=8.3198
y:3=\(\frac{8.3198}{8}\)
y:3=3198
y=3198.3
y=9594
t nhé
\(\left(y:3\right)\times8=8\times3198\)
\(\left(y:3\right)\times8=25584\)
\(\left(y:3\right)=25584:8\)
\(\left(y:3\right)=3198\)
\(y=3198\times3\)
\(y=9594\)