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\(\frac{4}{7}+y=\frac{5}{8}-\frac{1}{4}\)
\(\frac{4}{7}+y=\frac{3}{8}\)
\(y=\frac{3}{8}-\frac{4}{7}\)
\(y=-\frac{11}{56}\)
hình như bạn ra sai đề rồi
\(\frac{4}{7}+y=\frac{3}{8}\)
\(y=\frac{3}{8}-\frac{4}{7}=-\frac{11}{56}\)
`1-(12/5+y-8/9):16/9=0`
`=> (12/5+y-8/9):16/9=1-0`
`=> (12/5+y-8/9):16/9 =1`
`=> 12/5+y-8/9=1xx16/9`
`=> 12/5+y-8/9=16/9`
`=> 12/5+y=16/9+8/9`
`=> 12/5+y=8/3`
`=> y=8/3-12/5`
`=> y=4/15`
a) y + 3/7 x 21/9 = 5
y + 3/7 x 7/3 = 5
y + 1 = 5
y = 4
b) y x 3/5 - 1/2 = 4/5
y x 3/5 = 4/5 + 1/2
y x 3/5 = 13/10
y = 13/6
c) 9/8 - y + 2/5 = 1/4
y - 2/5 = 9 /8 - 1/4
y - 2/5 = 7/8
y = 51/40
d) y - 6/5 : 2/3 = 5/6
y - 9/5 = 5/6
y = 79/30
e) y : 7/8 + 3/4 = 7/4
y : 7/8 = 1
y = 7/8
bài 1 :
\(\frac{5}{12}\) + \(\frac{1}{3}\) = \(\frac{5}{12}\) + \(\frac{4}{12}\) = \(\frac{5+4}{12}\) = \(\frac{9}{12}\) = \(\frac{3}{4}\)
1 - \(\frac{3}{4}\) = \(\frac{4}{4}\) - \(\frac{3}{4}\) = \(\frac{4-3}{4}\) = \(\frac{1}{4}\)
2 x \(\frac{3}{11}\) = \(\frac{2x3}{11}\) = \(\frac{6}{11}\)
\(\frac{8}{7}\): 4 = \(\frac{8}{7x4}\) = \(\frac{8}{28}\) = \(\frac{2}{7}\)
bài 2 :
\(\frac{2}{5}\) : y = \(\frac{1}{3}\)
y = \(\frac{2}{5}\) : \(\frac{1}{3}\)
y = \(\frac{6}{5}\)
y : \(\frac{7}{11}\) = 22
y = 22 x \(\frac{7}{11}\)
y = 14
ai thấy đúng tk nha
\(y\times\dfrac{2}{3}=\dfrac{1}{4}+\dfrac{1}{1}\)
\(y\times\dfrac{2}{3}=\dfrac{1}{4}+\dfrac{4}{4}\)
\(y\times\dfrac{2}{3}=\dfrac{5}{4}\)
\(y=\dfrac{5}{4}:\dfrac{2}{3}\)
\(y=\dfrac{5}{4}\times\dfrac{3}{2}\)
\(y=\dfrac{15}{8}\)
\(5\times y=2\\ y=2:5\\ y=0,4\) \(\dfrac{8}{5}-y=\dfrac{1}{3}\\ y=\dfrac{8}{5}-\dfrac{1}{3}\\ y=\dfrac{23}{15}\)
\(y\times\dfrac{1}{2}+y\times\dfrac{1}{6}+y\times\dfrac{1}{12}+y\times\dfrac{1}{20}=\dfrac{8}{5}\)
\(y\times\left(\dfrac{1}{2}+\dfrac{1}{6}+\dfrac{1}{12}+\dfrac{1}{20}\right)=\dfrac{8}{5}\)
\(y\times\dfrac{4}{5}=\dfrac{8}{5}\)
\(\dfrac{8}{5}:\dfrac{4}{5}\)
\(y=\dfrac{8}{4}=2\)
`1/8 : y=1/5`
`=> y=1/8 : 1/5`
`=> y=1/8 xx 5`
`=>y=5/8`
\(\dfrac{1}{8}:y=\dfrac{1}{5}\)
\(y=\dfrac{1}{8}:\dfrac{1}{5}\)
\(y=\dfrac{5}{8}\)
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