Tim y biet:
32.4 x y + 68.6 x y - y = 4851
Tim y:
32.4 x y + 68.6 x y - y = 4851
\(32,4\times y+68,6\times y-y=4851\)
\(y\times\left(32,4+68,6-1\right)=4851\)
\(y\times100=4851\)
\(y=4851:100\)
\(y=48,51\)
32,4 x y + 68,6 x y - y=4851
(32,4+68,6)x y=4851
100 x y=4851
y=4851:100
y=48,51
Vậy y = 48,51
Trl
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Hok tốt
nhé bạn
a, Tim so tu nhien x, y biet rang 4<9/x<12/y<18
b, Tim so nguyen x, y biet rang x/2 - 2/y = 1/2
Lam cach nao de ra duoc ket qua nhu vay ha ban?
tim x va y biet x-y=x va x+y=y
\(x-y=x\Rightarrow x=x+y\) mà \(x+y=y\Rightarrow x=y\)
\(\Rightarrow x=0\Rightarrow x=y=0\)
Tim x y z biet x/(y-z)=y/(x+z)=z/(y-x)=x-y+z
Tim x,y,z biet x-y+z=x/(y*z)=y/(z+x)=z/(y-x)
giải hộ tớ bài tim x;y biet
a,/x/+/y/=5
b,/x/+/y/=7 biet x;y cùng dấu
tim x,y thuoc N biet x × y + y =20 y<x
Tim x, y biet: x+y=x:y=3(x-y)
\(x+y=3\left(x-y\right)\Leftrightarrow x+y=3x-3y\Leftrightarrow4y=2x\Leftrightarrow x:y=2\Leftrightarrow x=2y\)
\(x:y=2\Leftrightarrow x+y=2\Leftrightarrow2y+y=2\Leftrightarrow3y=2\Leftrightarrow y=\frac{2}{3}\)
\(x+y=2\Leftrightarrow x+\frac{2}{3}=2\Leftrightarrow x=2-\frac{2}{3}=\frac{4}{3}\)
Vậy \(x=\frac{4}{3}\) và \(y=\frac{2}{3}\)
Tim x, y biet: x+y=x:y=3(x-y)