\(\frac{x}{10}=\frac{y}{7}=\frac{z}{23}\Rightarrow\frac{x}{10}=\frac{y}{7}=\frac{z}{23}=\frac{2x+y-z}{20+7-23}=\frac{12}{4}=3\)
\(\Rightarrow x=30;y=21;z=69\)
tim x;y;z biet x/5=y/12=z/7 va x-y+z=30
tim 3 so x y va z biet 2x=3y=1,5z va x+y-z=10
bt1) TIM X,Y,Z biet:
a) x/y = 3/4 ; y/z = 5/7 va 2x + 3y - z = 186
b) 2x = 3y = 5z va /x+y-z/ = 95
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 x/3=y/4;y/5=z/7 va x+y+z=98
tim x, y, z, biet 4.x=6.y=12.z va x+y+z=30
tim x y z biet 2x=3y=4z va x+y+z=60
Tim x,z,y biet
x/2=y/3;y/4=z/5 va x+y-z=10
tim x,y,z biet : x/2=y/3=z/5 va x-2y+z=10
