Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(y:72,5=42,8-6,9.\\ \Leftrightarrow y:72,5=35,9.\\ \Leftrightarrow y=2602,75.\)
y x 87 + y x 8 - y = 42,8
y x ( 87 + 8 ) - y = 42,8
y x 95 - y = 42,8
y x 95 - y x 1 = 42,8
y x ( 95 - 1) = 42,8
y x 94 = 42,8
y = 42,8:94
y = 214/5 x 1/94
y =107/235
y : 2,5 = (42,8 + 5,38): 0,75
y : 2,5 = 48,18 : 0,75
y : 2,5 = 64,24
y = 64,24 x 2,5
y = 160,6
y : 2,5 = ( 42,8 + 5,38 ) : 0,75
y * 4 = 48,18 : 0,75
y * 4 = 64,24
y = 64,24 : 4
y = 16,06
`42,8:0,25+21,4xx8+42,8:0,5`
`=42,8xx4+42,8xx4+42,8xx2`
`=42,8xx(4+4+2)`
`=42,8xx10`
`=428`
a) \(y\times15+y\times13=560\times45\)
\(y\times\left(15+13\right)=25200\)
\(y\times28=25200\)
\(y=25200:28\)
\(y=900\)
b) \(y\times345-y\times44-y=123600\)
\(y\times\left(345-44-1\right)=123600\)
\(y\times300=123600\)
\(y=123600:300\)
\(y=412\)
y x 1,2 + y x 4,6 + y x 5,2 = 18
y x ( 1,2 + 4,6 + 5,2 ) = 18
y x 11 = 18
y = 18 : 11
y = \(\dfrac{18}{11}\)
Y x 1,2 + Y x 4,6 + Y x 5,2 = 18
Y x (1,2 + 4,6 + 5,2) = 18
Y x 11 = 18
Y = 18 : 11
Y = \(\dfrac{18}{11}\)
\(a,y\times2,8+5,2\times y=48\\ y\times\left(2,8+5,2\right)=48\\ y\times8=48\\ y=\dfrac{48}{8}=6\\ ---\\ b,y\times12,25-y+y\times2,75=1050\\ y\times\left(12,25-1+2,75\right)=1050\\ y\times14=1050\\ y=\dfrac{1050}{14}=75\)
a: \(y\cdot2,8+y\cdot5,2=48\)
=>\(y\left(2,8+5,2\right)=48\)
=>\(8y=48\)
=>\(y=\dfrac{48}{8}=6\)
b: \(y\cdot12,25-y+y\cdot2,75=1050\)
=>\(y\left(12,25-1+2,75\right)=1050\)
=>\(y\cdot14=1050\)
=>\(y=\dfrac{1050}{14}=75\)
a; 100% : \(x\) - 50% : \(x\) + 40% : \(x\) = 18 + 30% : \(x\)
(100% - 50% + 40%): \(x\) = 18 + 30% : \(x\)
90% : \(x\) = 18 + 30% : \(x\)
90%: \(x\) - 30%: \(x\) = 18
60% : \(x\) = 18
\(x\) = 60% : 18
\(x\) = \(\dfrac{1}{30}\)
\(65,4\times y-42,8\times y=339\)
\(y\times\left(65,4-42,8\right)=339\)
\(y\times22,6=339\)
\(y=339:22,6\)
\(y=15\)