2x(5x-4)-3x(x+6)=7x(x-1)-x
人气:253 ℃ 时间:2019-09-17 14:18:57
解答
10x²-8x-3x²-18x=7x²-7x-x
-26x=-8x
x=06x(7-x)=36-2x(3x-15)42x-6x²=36-6x²+30x42x-30x=3612x=36x=3
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