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\(y\times3+y\times4+y:3+y:4=182\\ y\times3+y\times4+y\times\dfrac{1}{3}+y\times\dfrac{1}{4}=182\\ y\times\left(3+4+\dfrac{1}{3}+\dfrac{1}{4}\right)=182\\ y\times\dfrac{91}{12}=182\\ y=182:\dfrac{91}{12}\\ y=24\)
`yxx3+yxx4+y:3+y:4=182`
`yxx3+yxx4+yx 1/3+yx1/4=182`
`yxx(3+4+1/3+1/4)=182`
`yxx 91/12=182`
`y=182: 91/12`
`y=182xx12/91`
`y=24`
Vậy `y=24`
\(y\times\dfrac{3}{4}++y:\dfrac{4}{5}=28\)
\(y\times\dfrac{3}{4}+y\times\dfrac{5}{4}=28\)
\(y\times\left(\dfrac{3}{4}+\dfrac{5}{4}\right)=28\)
\(y\times\dfrac{8}{4}=28\)
\(y\times2=28\)
\(y=\dfrac{28}{2}\)
\(y=14\)
\(y+y.\frac{1}{3}.\frac{9}{2}+y.\frac{7}{2}=25\)
\(y+y.6+y.\frac{7}{2}=25\)
\(y.\left(1+6+\frac{7}{2}\right)=25\)
\(y.\frac{21}{2}=25\)
\(y=25:\frac{21}{2}\)
\(y=25.\frac{2}{21}\)
\(y=\frac{50}{21}\)
\(y.5+y.3+y+y=50\)
\(y.\left(5+3+1+1\right)=50\)
\(y.10=50\)
\(y=5\)
\(13\cdot\left(y-6\right)=4\cdot y-6\)
\(\Rightarrow13y-78=4y-6\)
\(\Rightarrow13y-4y=78-6\)
\(\Rightarrow9y=72\)
\(\Rightarrow y=\frac{72}{9}=8\)
Vậy y = 8
\(13\times\left(y-6\right)=4\times y-6\)
\(\Rightarrow13\times y-78=4\times y-6\)
\(\Rightarrow13\times y-4\times y=\left(-6\right)+78\)
\(\Rightarrow9\times y=72\)
\(\Rightarrow y=72:9\)
\(\Rightarrow y=8\)
~ Hok tốt ~
a) \(\frac{7}{10}-y\cdot\frac{3}{4}=\frac{1}{5}\)
\(y\cdot\frac{3}{4}=\frac{7}{10}-\frac{1}{5}\)
\(y\cdot\frac{3}{4}=\frac{1}{2}\)
\(y=\frac{1}{2}:\frac{3}{4}\)
\(y=\frac{1}{2}\cdot\frac{4}{3}\)
\(y=\frac{2}{3}\)
b) \(\frac{5}{6}:\left(y+\frac{7}{9}\right)=\frac{3}{4}\)
\(y+\frac{7}{9}=\frac{5}{6}:\frac{3}{4}\)
\(y+\frac{7}{9}=\frac{5}{6}\cdot\frac{4}{3}\)
\(y+\frac{7}{9}=\frac{10}{9}\)
\(y=\frac{10}{9}-\frac{7}{9}\)
\(y=\frac{3}{9}=\frac{1}{3}\)
**** !
a, \(\frac{7}{10}-y\times\frac{3}{4}=\frac{1}{5}\)
\(\Rightarrow y\times\frac{3}{4}=\frac{7}{10}-\frac{1}{5}\)
\(\Rightarrow y\times\frac{3}{4}=\frac{1}{2}\)
\(\Rightarrow y=\frac{1}{2}\div\frac{3}{4}\)
\(\Rightarrow y=\frac{1}{3}\)
b, \(\frac{5}{6}\div\left(y+\frac{7}{9}\right)=\frac{3}{4}\)
\(\Rightarrow y+\frac{7}{9}=\frac{5}{6}\div\frac{3}{4}\)
\(\Rightarrow y+\frac{7}{9}=\frac{10}{9}\)
\(\Rightarrow y=\frac{10}{9}-\frac{7}{9}\)
\(\Rightarrow y=\frac{1}{3}\)
a) (y - 24) : 28 = 20
y - 24 = 20 x 28
y - 24 = 560
y = 560 + 24
y = 584
vậy y = ...
a.
\(\left(y-24\right):28=20\)
\(\left(y-24\right)=560\)
\(y=584\)
b. \(13\times\left(y-6\right)=4\times y-6\)
\(13\times y-78=4\times y-6\)
\(9\times y=72\)
\(y=8\)
c.\(y\times3+y\times4+y:3+y:4=182\)
\(y\times\left(3+4\right)+y:\left(3+4\right)=182\)
\(y\times\left(7+\dfrac{1}{7}\right)=182\)
\(y=\dfrac{637}{25}\)