1 tim cac so nguyen x,y biet x/7=6/21 -5/y=20/28 1/2=x/12 x/8=-28/32 3/y=12/24 3/4=15/y 2 viet 3 phan so bang phan so -10/15
Tim so nguyen x,y biet x^2-y^2=5
tim so nguyen x,y biet 5/x+y/4=1/8
tim cac so nguyen x,y biet x^2-(y-3)x-2y-1=0
tim so nguyen x,y biet 42-3|y-3|=4(2012-x)^4
Tim cac so nguyen x,y,z biet
x(x+y+z)=-5
y(x+y+z)=9
z(x+y+z)=5
tim x,y nguyen to biet 272x-29=11^y
tim cap so x,y nguyen biet :
a,\(|2x+3|+|2x-1|=\frac{8}{2|x-5|+2}\)
tim cap so nguyen X,Y biet 8x(2009-x)^2=25-y^2
