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\(\frac{5}{12}\): y =\(\frac{5}{6}\)-\(\frac{1}{2}\)*\(\frac{5}{4}\)
5/12.1/y=5/6-5/8
\(\frac{5}{12y}\)=\(\frac{5}{24}\)
\(\Rightarrow\)12y=24
y=2
y:0,15 = ( 2,8 + 0,38 ) : 0,75
y:0,15= 3,18 : 0,75
y:0,15= 4,24
y = 4,24 *0,15
y= 0,636
\(a.\)\(y-\frac{11}{3}=\frac{12}{5}\)
\(y=\frac{12}{5}+\frac{11}{3}\)
\(y=\frac{91}{15}\)
\(b.2-y=\frac{15}{6}\)
\(y=2-\frac{15}{6}\)
\(y=-\frac{1}{2}\)
\(c.y\times2\frac{2}{3}=\frac{4}{9}\)
\(y=\frac{4}{9}:2\frac{2}{3}\)
\(y=\frac{1}{6}\)
\(d.y:1\frac{2}{5}=\frac{21}{10}\)
\(y=\frac{21}{10}\times1\frac{2}{5}\)
\(y=\frac{147}{5}\)
6 + 2 + 5 + 7 + 5 =
= 6 + 2 + 7 + ( 5 + 5 )
=8 + 7 + 10
=15 + 10
= 25
\(\frac{5}{12}:y=\left(\frac{5}{6}-\frac{1}{2}\right)\times\frac{5}{4}\)
\(\Rightarrow\frac{5}{12}:y=\left(\frac{5}{6}-\frac{3}{6}\right)\times\frac{5}{4}\)
\(\Rightarrow\frac{5}{12}:y=\frac{2}{6}\times\frac{5}{4}\)
\(\Rightarrow\frac{5}{12}:y=\frac{5}{12}\)
\(\Rightarrow y=\frac{5}{12}:\frac{5}{12}\)
\(\Rightarrow y=1\)
Vậy \(y=1\)
Chúc bạn học tốt !!!
\(\frac{5}{12}:y=\left(\frac{5}{6}-\frac{1}{2}\right)x\frac{5}{4}\)
\(\frac{5}{12}:y=\frac{1}{3}x\frac{5}{4}\)
\(\frac{5}{12}:y=\frac{5}{12}\)
\(\Rightarrow y=\frac{5}{12}:\frac{5}{12}=1\)