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\(a,5\frac{1}{4}+3,25-50\%+y=15,25\)
\(\Leftrightarrow5,25+3,25-\frac{50}{100}+y=15,25\)
\(\Leftrightarrow5,25+3,25-0,5+y=15,25\)
\(\Leftrightarrow8+y=15,25\)
\(\Leftrightarrow y=15,25-8=7,25\)
\(b,(y-3):2=2010\)
\(\Leftrightarrow y-3=4020\)
\(\Leftrightarrow y=4023\)
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Lớp học online hay j mà lắm giáo viên thế🤔🤔 Lớp học của tri thức à?
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\(1,x+4\cdot25=1000\)
\(\Rightarrow x+100=1000\)
\(\Rightarrow x=900\)
\(2,y\cdot17+y\cdot15+y\cdot1-y\cdot3=1860\)
\(\Rightarrow y\cdot\left(17+15+1-3\right)=1860\)
\(\Rightarrow30y=1860\)
\(\Rightarrow y=62\)
\(3,y\cdot33-y\cdot3=1860\)
\(\Rightarrow y\left(33-3\right)=1860\)
\(\Rightarrow30y=1860\)
\(\Rightarrow y=62\)
\(4,142-\frac{x}{2}=43\)
=?\(\frac{x}{2}=99\)
=>\(x=198\)
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\(y+y.\frac{1}{3}.\frac{9}{2}+y.\frac{7}{2}=25\)
\(y+y.6+y.\frac{7}{2}=25\)
\(y.\left(1+6+\frac{7}{2}\right)=25\)
\(y.\frac{21}{2}=25\)
\(y=25:\frac{21}{2}\)
\(y=25.\frac{2}{21}\)
\(y=\frac{50}{21}\)
\(y.5+y.3+y+y=50\)
\(y.\left(5+3+1+1\right)=50\)
\(y.10=50\)
\(y=5\)
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9/4 - y × 5/6 = 1/2 + 1/3
9/4 - y × 5/6 = 5/6
y × 5/6 = 9/4 - 5/6
y × 5/6 = 17/12
y = 17/12 : 5/6
y = 17/10
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\(\frac{9}{4}-y\times\frac{5}{6}=\frac{1}{2}+\frac{2}{3}\)
\(\frac{9}{4}-y\times\frac{5}{6}=\frac{7}{6}\)
\(y\times\frac{5}{6}=\frac{9}{4}-\frac{7}{6}\)
\(y\times\frac{5}{6}=\frac{13}{12}\)
\(y=\frac{13}{12}:\frac{5}{6}\)
\(y=\frac{13}{10}\)
1, 4/3:1/2xy=9/2
8/3xy=9/2
y=9/2:8/3
y=27/16
Bạn thử tính lại xem sao! Chứ mik thấy bn MinYewCou làm sai thì phải
2, 3/4-y+4/5=1
3/4-y =1-4/5
3/4-y =1/5
y =3/4-1/5
y =11/20
Chúc bn hok tốt!!!
`4/3 : 1/2 xx y =9/2`
`=> 1/2 xx y = 4/3 : 9/2`
`=> 1/2 xx y = 4/3 xx 2/9`
`=> 1/2 xx y =8/27`
`=> y=8/27 : 1/2`
`=> y=8/27 xx 2`
`=> y= 16/27`
`3/4 -y+4/5 =1`
`=> 3/4 -y=1-4/5`
`=> 3/4 - y= 5/5-4/5`
`=> 3/4 -y=1/5`
`=> y=3/4 -1/5`
`=> y= 15/20-4/20`
`=> y= 11/20`