y x 25 = 600 y : 23 =64
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y \(\times\) \(\dfrac{16}{64}\) + y \(\times\) \(\dfrac{25}{100}\) + y \(\times\) \(\dfrac{1}{4}\) + y \(\times\) \(\dfrac{15}{60}\) - \(\dfrac{13}{15}\) = \(\dfrac{17}{15}\)
y \(\times\) ( \(\dfrac{1}{4}\) + \(\dfrac{1}{4}\) + \(\dfrac{1}{4}\)+ \(\dfrac{1}{4}\)) - \(\dfrac{13}{15}\) = \(\dfrac{17}{15}\)
y = \(\dfrac{17}{15}\) + \(\dfrac{13}{15}\)
y = \(\dfrac{30}{15}\)
y = 2
Cái này bằng rủ em chơi oẳn tù tì ,em ra lá còn anh ra hôn má em
`#qlv`
`(11)/(25) . (y + y5 - (23)/(55)) + 3/(14) . (56)/(25) = 1`
`=> (11)/(25) . (6y - (23)/(55)) + (12)/(25) = 1`
`=> (11)/(25) . (6y - (24)/(55)) = 1 - (12)/(25)`
`=> (11)/(25) (6y - (23)/(55)) = (13)/(25)`
`=> 6y - (23)/(55) = (13)/(25) : (11)/(25)`
`=> 6y - (23)/(55) = (13)/(11)`
`=> 6y = (13)/(11) + (23)/(55)`
`=> 6y = 8/5`
`=> y = 8/5 : 6`
`=> y = 8/5 . 1/6`
`=> y = 4/(15)`
Vậy `y = 4/(15)`
\(\dfrac{11}{25}\times\left(y+y\times5-\dfrac{23}{55}\right)+\dfrac{3}{14}\times\dfrac{56}{25}=1\)
\(\Rightarrow\dfrac{11}{25}\times\left(10\times y-\dfrac{23}{55}\right)+\dfrac{12}{25}-1=0\)
\(\Rightarrow\dfrac{22}{5}\times y-\dfrac{23}{125}-\dfrac{13}{25}=0\)
\(\Rightarrow\dfrac{22}{5}\times y=\dfrac{88}{125}\)
\(\Rightarrow y=\dfrac{88}{125}:\dfrac{22}{5}\)
\(\Rightarrow y=\dfrac{4}{25}\)
Ta có: 98xy+y+y=64x25
yx(98+1+1)=1600
yx100=1600
y=1600:100=16
Vậy y=16
98 x y + y + y = 64 x 25
98 x y + y x 2 = 1600
y x (98 + 2) = 1600
y x 100 = 1600
y = 1600 : 100
y - 16
Vậy x = 16
Bài 3:
a: Ta có: \(23\left(42-x\right)=23\)
\(\Leftrightarrow42-x=1\)
hay x=41
b: Ta có: 15(x-3)=30
nên x-3=2
hay x=5
Bài 1:
a: 32+89+68=100+89=189
b: 64+112+236=300+112=412
c: \(1350+360+650+40=2000+400=2400\)
a, (85 + 15) x y = 4000 c,
100 x y = 4000
y = 4000 : 10
y = 40
a ) 64 x y = 2880 - 192
=> 64 x y = 2688
=> y = 2688 : 64
=> y = 42
b) 10 - y = 46,8 : 6,5
=> 10 - y = 7,2
=> y = 10 - 7,2
=> y = 2,8
c) 7 + y = 25/3
=> y = 25/3 - 7
=> y = 4/3
64 * y = 2880 - 192
64 * y = 2688
y = 2688 : 64
y = 42
10 - y = 46.8 : 6.5
10 - y = 7.2
y = 10 - 7.2
y= 2.8
7 + y = 25/3
y = 25/3 - 7
y = 25/3 - 21/3
y = 4/3
y * 25= 600 y: 23 =64
y= 600 : 25 y=64*23
y= 24 y=1472