GRE数学题：P and Q are points on a number line.the coordinate of P is 5 and the

题目

GRE数学题：P and Q are points on a number line.the coordinate of P is 5 and the
P and Q are points on a number line.the coordinate of P is 5 and the diatance between P and Q is 12.
question:the coordinate of Q 是多少

答案

P和Q是一个数轴上的点.
P的坐标为5,P和Q的距离为12.
问：Q的坐标是多少.
可能在左,也可能在右.
在左就是:5-12=-7
在右就是:5+12=17