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3X+a=0 x=-a/3 -2/3x-4=a x=-3(a+4)/2 X的方程3X+a=0的解比方程-2/3x-4=a的解大2 -a/3-(-3(a+4)/2)=2 -2a+9a+36=12 7a=-24 a=-24/7
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