如果直线y=2x+3与直线y=3x﹣2b的交点在x轴上,那么b的值为______.

如果直线y=2x+3与直线y=3x﹣2b的交点在x轴上,那么b的值为______.

答案

 ﹣ 

【解答】解:当y=0时,2x+3=0,解得x=﹣,则直线y=2x+3与x轴的交点坐标为(﹣,0),

把(﹣,0)代入y=3x﹣2b得3×(﹣)﹣2b=0,解得b=﹣

故答案为﹣

 

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