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数学
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2(x一2)十3(2x一1)=9(x一1)
人气：410 ℃ 时间：2020-05-14 07:40:57
解答
2X-4+6X-3=9X-9
2X+6X-9X=4+3-9
-X=-2
X=2
推荐
|x-2|-3|x+1|=2x-9
|2-x|-3|x+1|=2x-9
2（x-2）+3(2x-1)=9(x+1)
1/(x-3)-6/(x^2-9)+(1-x)/(6+2x)
解方程1/x（x+1）+1/（x+1）（x+2）+...+1/(x+8)(x+9)=2x+3/x(x+9)
1.互为相反数的两个数大小相等.2.互为相反数的两数的和等于零
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