一箱灯泡先拿出它的，再拿出48个，这时箱内剩下的灯泡正好是这箱灯泡数的，问先拿出几个灯泡？
计算下面各题．．
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计算下面各题．=========
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直接写出得数．============
，再拿出48个，这时箱内剩下的灯泡正好是这箱灯泡数的
，问先拿出几个灯泡？
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