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A line has slope=-2/3 and y-intercept=120.What is the x-intercept of this same line?
人气：455 ℃　时间：2020-04-16 11:01:25
解答
假设函数：y=kx+b,由题目可得：y=-2/3x+b 当y=0时,x上的截距=180
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