Các câu hỏi tương tự
tim cac so x,y,z thuoc Q biet rang (x+y):(5-z):(y+z):(y+9)=3:1:2:5
1/2x=2/3y=3/4zva x-y=15
tim x;y;z biet
1/2x=2/3y=3/4z va x-y =15
a, Tim x biet:/x-2/+/3-2x/=2x+1
b, Tim x,y thuoc Z biet:xy+2x-y=5
c, tim x,y,z, biet :2x=3y;4y=5zva 4x-3y+5z=7
Tim cac so x,y,z biet x/y=9/7; y/2=7/3 va x-y+z=-15
Tim x+y+z = ? biet (x-1) /2= (y-2) /3 = (z-3) /4 va 2x+3y-z=95
tim 3 so x y va z biet 2x=3y=1,5z va x+y-z=10
tim x,y,z biet
x+1/2 = y-2/3 = z-3/4 va 2x + 3y - z = 50
tim x,y,z biet
x+1/2 = y-2/3 = z-3/4 va 2x + 3y - z = 50