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a) y = 5/14 : 6/7
y = 5/12
vậy y = 5/12
b) y = 4/9 x 2/3
y = 8/27
vậy t = 8/27
c) y = 1/2 - 3/10
y = 1/5
vậy y = 1/5
d) y = 5/6 - 1/3
y = 1/2
vậy y = 1/2
a) y × 2/5 + y × 3/5 = 5/7
y x ( 2/5 + 3/5) = 5/7
y x 5/5 = 5/7
y x 1 = 5/7
y = 5/7 : 1
y = 5/7
b) y × 7/2 - y × 3/2 = 3/4
y x ( 7/2 - 3/2) = 3/4
y x 4/2 = 3/4
y x 2 = 3/4
y = 3/4 : 2
y = 3/4 x 1/2
y = 3/8
`a,yxx(2/5+3/5)=5/7`
`y xx1=5/7`
`y=5/7:1`
`y=5/7`
`b,y xx(7/2-3/2)=3/4`
`y xx2=3/4`
`y =3/4:2`
`y=3/2`
\(a,\frac{42}{25}:\frac{y}{5}=\frac{6}{5}\)
\(\frac{y}{5}=\frac{42}{25}:\frac{6}{5}\)
\(\frac{y}{5}=\frac{42}{25}\times\frac{5}{6}\)
\(\frac{y}{5}=\frac{7}{5}\)
\(\Leftrightarrow5y=7.5\)
\(5y=35\)
\(y=7\)
Mk trả lời thiếu, chờ 1 lát
a) 3,7 x y + 5,28 = 14,9
3,7 x y= 9,62
y = 9,62 : 3,7
y = 2,6
a, 36 : y + 24 : y = 10 b, ( y - 906 ) x a = aaaa
( 36 + 24 ) : y = 10 y - 906 = aaaa : a
60 : y = 10 y - 906 = 1111
y = 60 : 10 y = 1111 + 906
y = 6. y = 2017.
Vậy y = 6. Vậy y = 2017.
~Chúc bạn hok tốt~
#Sa-ngu-ngốc
a. y x 47 = 24064
y = 24064 : 47
y = 512
b. Y x 2 7 = 3 4 x 4 15 Y x 2 7 = 1 5 Y = 1 5 : 2 7 Y = 1 5 x 7 2 Y = 7 10
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 + 32487 = 63048−2827
y + 32487 = 60221
y = 60221−32487
y = 27734
Vậy y = 27734.
Đáp án D