已知 x/2 = y/3 = z/5 ≠ 0 求 (x-y+3z) / (3x+2y)
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已知x/2=y/3=z/5≠0求(x-y+3z)/(3x+2y)已知x/2=y/3=z/5≠0求(x-y+3z)/(3x+2y)已知x/2=y/3=z/5≠0求(x-y+3z)/(3x+2y)设x=2
已知 x/2 = y/3 = z/5 ≠ 0 求 (x-y+3z) / (3x+2y)
已知 x/2 = y/3 = z/5 ≠ 0 求 (x-y+3z) / (3x+2y)
已知 x/2 = y/3 = z/5 ≠ 0 求 (x-y+3z) / (3x+2y)
设x=2,y=3,z=5
（2-3+3*5）/（3*2+2*3）=7/6
y=3x/2;z=5x/2;
(x-y+3z) / (3x+2y) =(x-3x/2+3*5x/2)/(3x+2*3x/2)=7/6
7/6
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