cho:x phan 2=y phan 3= z phan 5 va x×y×z=810 tinh x+y+z
tim cac so x,y,z biet x -1 phan 2 bang y cong 3 phan 4 bang z-5 phan 6 va 5z - 5x - 4y bang 50
Cho biet 3(x.y)=7(y-z)=5(z-x)
CMR y-x tat ca phan 9 = z-y tat ca phan 14
cho x,y z>0 phan biet ,bt y/x-z₫ x+y/z₫x/y. hay tinh Q bang x/y +y/x +2
x phan 12 = y phan 9 = z phan 5 va xyz =20
TIM X BIET :
X PHAN 10=Y PHAN 5;Y PHAN 2 =Z PHAN 3 VA 2X -3Y +4Z=330
CHI MIHK NHA THANK NHIEU LM
4x phan 5 = 5y phan 6= 10z phan 11 va x+ y+ z =710
x-1/2 =y-2/3 =z-3/4
va 2x+3y-z=50
/ la dau phan so nha
1,tim ba so x,y,z.bt rang:
x/2=y/3,y/4=z/5(dau / la phan)
2,tim 2 so x,ybt:x:2=y:(-5) va x-y=7
nhanh thi tick
