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X-3X=-16 -2x =-16 x=(-16)除以(-2) x=8
x+5分之3x=17分之16 8/5X=16/17 X=16/17*5/8 X=10/17
(3x-4)×5=4 3x-4=0.8 3x=4.8 x=1.6
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