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a)100-9:(372:3.y-1)-14=83
<=>100-9:(124y-1)-14=83
<=>86-9:(124y-1)=83
<=>9:(124y-1)=3
<=>124y-1=3
<=>124y=4
<=>y=\(\frac{1}{31}\approx0,3223\)
b)7260-120:24.y+924=528,3
<=>8184-5y=528,3
<=>5y=7655,7
<=>y=1531,14
c)2000-52:(615:3:y-15)-14=1984
<=>1986-52:(205:y-15)=1984
<=>52:(205:y-15)=2
<=>205:y-15=26
<=>205:y=41
<=>y=5
d)y+y.1/3+5/18=7/18
<=>4/3y=1/9
<=>y=1/12
e)13/15-(5/21+y)7/12=7/10
<=>7/12.(5/21+y)=1/6
<=>5/36+7/12y=1/6
<=>7/12y=1/36
<=>y=1/21\(\approx\)0,4762
h)y+2.y+3.y+...+10.y=49,5
<=>55y=49,5
<=>y=0,9
i)y.(1975/8.9+1885/9.10+1755/10.11+1579/11.12)=1/24
<=>7991,364899y=1/24
<=>y=33/6329161
tích nha mỏi tay quá
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y : 2 + y : 3 + y : 4 = 13
y : ( 2+3+4 ) = 13
y : 9 = 13
y = 13 x 9
y = 117
k cho mình nhé !!
y : 2 + y : 3 + y : 4 = 13
y : (2 + 3 + 4) = 13
y : 9 = 13
y = 13 x 9
y = 117
Học tốt
Akina
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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.\(y\times3+y\times4+y:3+y:4=182\)
\(y\times\left(3+4\right)+y:\left(3+4\right)=182\)
\(y\times\left(7+\dfrac{1}{7}\right)=182\)
\(y=\dfrac{637}{25}\)
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`125xxy - 12xxy - 13xxy = 5 208000`
`(125-12-13)xxy=5 208 000`
`100xxy=5208 000`
`y=5208000:100=52080`
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a) \(y+2\frac{1}{3}=3\)
=> y + 7/3 = 3
=> y = 3 - 7/3
=> y = 2/3
b) \(y-1\frac{1}{4}=1\frac{1}{8}\)
=> y - 5/4 = 9/8
=> y = 9/8 + 5/4
=> y = 19/8
c) \(3-y=1\frac{1}{4}\)
=> 3 - y = 5/4
=> y = 3 - 5/4
=> y = 7/4
d) \(y\times2\frac{3}{5}=1\frac{13}{15}\)
=> y x 13/5 = 28/15
=> y = 28/15 : 13/5
=> y = 28/39
e) \(2:y=2\frac{3}{7}\)
=> 3 : y = 17/7
=> y = 3 : 17/7
=> y = 21/17
a) y + 2/1/3 = 3
y + 7/3 = 3
y = 2/3
cac bai con lai bn tu dua vao cong thuc da hoc mak lm nha!
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mình ko chép đề bài nha
a) \(\dfrac{16}{5}\): \(\dfrac{7}{3}\) : y =\(\dfrac{12}{7}\)
\(\dfrac{48}{35}\): y = \(\dfrac{12}{7}\)
y = \(\dfrac{48}{35}\): \(\dfrac{12}{7}\)
y = \(\dfrac{4}{5}\)
\(\dfrac{y}{2}+\dfrac{y+y}{3}+\dfrac{y+y+y}{4}=\dfrac{13}{12}\)
\(\dfrac{1}{2}y+\dfrac{2}{3}y+\dfrac{3}{4}y=\dfrac{13}{12}\)
\(y\left(\dfrac{1}{2}+\dfrac{2}{3}+\dfrac{3}{4}\right)=\dfrac{13}{12}\)
\(\dfrac{23}{12}y=\dfrac{13}{12}\)
\(y=\dfrac{13}{12}\div\dfrac{23}{12}=\dfrac{13}{23}\)
con cặc