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PC
4 tháng 10 2021 lúc 20:40
TIM X , Y , Z BIET
a x/3 = y/4 = z/5 va x + y + z = 36
b x/3 = y/4 = z/7 va 2x + y - z = - 24
tim x y z biet 2x=3y=4z va x+y+z=60
tim x,y,z biet 4x=3y,7y=5z va yz-2x^2=110
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
Tim x,y,z biet
x/2=y/33=z/4 va xy+yz+zx=104
tim x va y biet
a)x/18=y/15 va x-y=-30
b)7*x=9*y va 10*x-8*y=68
c)(x1/2)^50 +(y+1/3)^40=o
Tim x,y,z biet:
x+1/ 3 = y+2/ 4 = z+3/ 5 va x+y+z= 18
Tim x,y,z biet
b) 2x=3y:5y=72 va 3x-7y+5z=30
c) x:y:z=4:5:6 va x2-2y2+22=18
Bai 1: tim x,y,z biet rang
a,\(\frac{x}{1}\)=\(\frac{y}{2}\)=\(\frac{z}{3}\)va 4x -3y +2z =36
b,x : y: z=3 :5 :(-2) va 5x -y +3z =124
c,2x= 3y, 5y= 7z va 3x- 7y+ 5z = -30