X与3Y互为相反数,求-X-2Y除以-X+2Y的值谁会做?

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/12 14:15:57

x+3y=0 x=-3y (-x-2y)/(-x+2y) =x+2y/x-2y =-3y+2y/-3y-2y=-y/-5y=1/5

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