点A在数轴上距原点3个单位长度,且位于原点左侧,若将A向右移动4

A在数轴上距原点3个单位长度,且位于原点左侧,若将A向右移动4个单位长度,再向左移动1个单位长度,此时点A所表示的数是        .

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