Tìm x ; y ; z biết \(\frac{x-1}{2}\)=\(\frac{y-2}{3}\)=\(\frac{z-3}{4}\)và 2x + 3y - z = 50
Trả lời : x=...................................... ; y= ..............................................; z= ......................................................................................
x=11,y=17,z=23