2016-04-07 18:04发布
解：3(X-4)-2(4X-3)=12(X-9)3x-12-8x+6=12x-1083x-8x-12x=-108+12-6-17x=-102x=6
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解：3(X-4)-2(4X-3)=12(X-9)
3x-12-8x+6=12x-108
3x-8x-12x=-108+12-6
-17x=-102
x=6
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