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yx(15+35)=150
yx50 =150
y =150:50=3
yx5=713-173
yx5=540
y =540:5=108
\(\frac{4}{15}:y=\left(\frac{4}{5}+\frac{1}{2}\right)\times\frac{4}{13}\)
\(\frac{4}{15}:y=\frac{13}{10}\times\frac{4}{13}\)
\(\frac{4}{15}:y=\frac{2}{5}\)
\(y=\frac{4}{15}:\frac{2}{5}\)
\(y=\frac{2}{3}\)
\(\frac{4}{15}:y=\left(\frac{4}{5}+\frac{1}{2}\right)\times\frac{4}{13}\)
\(\frac{4}{15}:y=\frac{13}{10}\times\frac{4}{13}\)
\(\frac{4}{15}:y=\frac{2}{5}\)
\(y=\frac{4}{15}:\frac{2}{5}\)
\(y=\frac{2}{3}\)
\(\frac{4}{15}:y=\left(\frac{8}{10}+\frac{5}{10}\right)X\frac{4}{13}\)
\(\frac{4}{15}:y=\frac{13}{10}X\frac{4}{13}\)
\(\frac{4}{15}:y=\frac{2}{5}\)
\(y=\frac{4}{15}:\frac{2}{5}\)
\(y=\frac{4}{15}X\frac{5}{2}\)
\(y=\frac{2}{3}\)
HOK TỐT
a,+) 4/x=12/15
=>15*4=12*x
=>60=12*x
=>x=5;có 4/x=y/45
=>4/5=y/45
=>36/45=y/45
=>y=36
Vậy x=5:y=36
b,3/x=1/y=6/24
=>3/x=1/y=1/4
có: 1/y=1/4
=>y=4
có: 1/4=3/x
=>1x=3*4
=>x=12
Vây x=12
y=4
hok tot
a) \(\frac{4}{5}=\frac{12}{15}=\frac{36}{45}\)
Tự giải quyết nốt =))
a) \(y\times27+y\times30+y\times43=210500\)
\(y\times\left(27+30+43\right)=210500\)
\(y\times100=210500\)
\(y=210500\div100\)
\(y=2105\)
b) \(15\times y+85\times y=300\)
\(y\times\left(15+85\right)=300\)
\(y\times100=300\)
\(y=300\div100\)
\(y=3\)
\(a,y\times27+y\times30+y\times43=210500\)
\(\Rightarrow y\times\left(27+30+43\right)=210500\)
\(\Rightarrow y\times100=210500\)
\(\Rightarrow y=210500:100=2105\)
\(b,15\times y+85\times y=300\)
\(\Rightarrow y\times\left(15+85\right)=300\)
\(\Rightarrow y\times100=300\)
\(\Rightarrow y=300:100=3\)
y \(\times\) \(\dfrac{16}{64}\) + y \(\times\) \(\dfrac{25}{100}\) + y \(\times\) \(\dfrac{1}{4}\) + y \(\times\) \(\dfrac{15}{60}\) - \(\dfrac{13}{15}\) = \(\dfrac{17}{15}\)
y \(\times\) ( \(\dfrac{1}{4}\) + \(\dfrac{1}{4}\) + \(\dfrac{1}{4}\)+ \(\dfrac{1}{4}\)) - \(\dfrac{13}{15}\) = \(\dfrac{17}{15}\)
y = \(\dfrac{17}{15}\) + \(\dfrac{13}{15}\)
y = \(\dfrac{30}{15}\)
y = 2
Cái này bằng rủ em chơi oẳn tù tì ,em ra lá còn anh ra hôn má em
\(\frac{4}{x}=\frac{12}{15}=\frac{4}{5}\Rightarrow x=5\)
\(\frac{y}{45}=\frac{12}{15}=\frac{4}{5}=\frac{36}{45}\Rightarrow y=36\)
Vậy: x= 5 và y= 36
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d