已知x⼀2=y⼀3=z⼀5,求分式2x+3y-z⼀3x-2y+z

2025-01-19 16:31:45
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回答1:

x/2=y/3=z/5
x:y:z=2:3:5
(2x+3y-z)/(3x-2y+z)=(2*2+3*3-5*1)/(3*2-2*3+5)=8/5