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y x 2+y x 15/5 = 13/5
y x ( 2 + 15/5 ) =13/5
y x 5 = 13/5
y = 13/5 : 5
y = 13/25
\(a.\)\(y-\frac{11}{3}=\frac{12}{5}\)
\(y=\frac{12}{5}+\frac{11}{3}\)
\(y=\frac{91}{15}\)
\(b.2-y=\frac{15}{6}\)
\(y=2-\frac{15}{6}\)
\(y=-\frac{1}{2}\)
\(c.y\times2\frac{2}{3}=\frac{4}{9}\)
\(y=\frac{4}{9}:2\frac{2}{3}\)
\(y=\frac{1}{6}\)
\(d.y:1\frac{2}{5}=\frac{21}{10}\)
\(y=\frac{21}{10}\times1\frac{2}{5}\)
\(y=\frac{147}{5}\)
Tìm y:
\(\frac{Y}{15}=\frac{2}{5}\) => y = 15 x 2/ 5 = 6
Vậy y = 6
tk ủng hộ giúp mk nha!!!!!!!!!
3,75 : y = 15 : 5
3,75 : y = 3
y = 3,75 : 3
y = 1,25
nhớ ủng hộ mik nghen mn @@@
3,75 : y = 15 : 5
3,75 : y = 3
y = 3,75 : 3
y = 1,25
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
a, ( 5 x y - 15 ) : 5 = 0
( 5 x y - 15 ) = 0 x 5
( 5 x y - 15 ) = 0
5 x y = 0 + 15
5 x y = 15
y = 15 : 5
y = 3
b. 14 x ( y - 7 ) = 210
( y - 7 ) = 210 : 14
( y - 7 ) = 15
y = 15 + 7
y = 22
c. 84 - 4 x ( 2 x y + 1 ) = 48
4 x ( 2 x y + 1 ) = 84 - 48
4 x ( 2 xy + 1 ) = 36
( 2 x y + 1 ) = 36 : 4
( 2 x y + 1 ) = 9
2 x y = 9 - 1
2 x y = 8
y = 8 : 2
y = 4
d. 5 x y - 2009 = 1201
5 x y = 1201 + 2009
5 x y = 3210
y = 3210 : 5
y = 642
a. (5.y-15):5=0
=> 5.y-15 = 0
=> 5.y = 15
=> y = 3
b. 14.(y-7) = 210
=> y-7 = 15
=> y = 22
c. 84-4.(2.y+1)=48
=> 4.(2.y+1) = 36
=> 2.y+1 = 9
=> 2.y = 8
=> y = 4
d) 5.y-2009 = 1201
=> 5.y = 3210
=> y = 642
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!
2y - 15 = 5
=> 2y = 5 + 15
=> 2y = 20
=> y = 20 : 2
=> y = 10
vậy y = 10
k nhé
2y - 15 = 5
2y = 5 + 15
2y = 20
y = 10
mik nah nhất đó