tìmY:
a)5/y=1/2 b)42/25:y/5=6/5
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a) \(\dfrac{5}{y}=\dfrac{1}{2}\)
\(y=\dfrac{5\times2}{1}=10\)
b) \(\dfrac{42}{25}:\dfrac{y}{5}=\dfrac{6}{5}\)
\(\dfrac{y}{5}=\dfrac{42}{25}:\dfrac{6}{5}\)
\(\dfrac{y}{5}=\dfrac{7}{5}\)
\(y=7\)
Mk trả lời thiếu, chờ 1 lát
a) 3,7 x y + 5,28 = 14,9
3,7 x y= 9,62
y = 9,62 : 3,7
y = 2,6
\(a,\Rightarrow y=\dfrac{2\cdot5}{1}=10\\ b,\Rightarrow\dfrac{y}{5}=\dfrac{42}{25}:\dfrac{6}{5}=\dfrac{7}{5}\Rightarrow y=7\)
\(a,\frac{42}{25}:\frac{y}{5}=\frac{6}{5}\)
\(\frac{y}{5}=\frac{42}{25}:\frac{6}{5}\)
\(\frac{y}{5}=\frac{42}{25}\times\frac{5}{6}\)
\(\frac{y}{5}=\frac{7}{5}\)
\(\Leftrightarrow5y=7.5\)
\(5y=35\)
\(y=7\)
`5/y =1/2`
`=> 5*2=y`
`=> 10=y`
`=>y=10`
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`42/25 : y/5 = 6/5`
`=>y/5 = 42/25 : 6/5`
`=>y/5 =42/25 xx 5/6`
`=>y/5 =7/5`
`=> y=7`
\(\dfrac{5}{y}=\dfrac{1}{2}\\ Vậy:y=\dfrac{5\times2}{1}=10\\ Vậy:y=10\\ ---\\ \dfrac{42}{25}:\dfrac{y}{5}=\dfrac{6}{5}\\ \dfrac{y}{5}=\dfrac{42}{25}:\dfrac{6}{5}=\dfrac{7}{5}\\ Vậy:y=7\)
`a)5/y=1/2`
`5/y=5/10`
`y=10`
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`b)42/25:y/5=6/5`
`y/5=42/25:6/5`
`y/5=7/5`
`y=7`