Question

x:y=3:2 y:z=2:5 x+2y-z=8怎么做

Answer 1

x:y=3:2 x=1.5y y:z=2:5 z=2.5y x+2y-z=8也就是1.5y+2y-2.5y=8 y=8 x=12 z=20

x:y:z=1:2:3 z=3x y=2x x+2y+3z=8也就是x+6x+9x=8 x=0.5 y=1 z=1.5