小明今年x岁,
5x+4=69,
5x=69-4,
x=13;
答:小明今年13岁.
爷爷今年69岁,爷爷的年龄比小明年龄的5倍还大4岁.小明今年几岁?
爷爷今年69岁,爷爷的年龄比小明年龄的5倍还大4岁.小明今年几岁?
数学人气:554 ℃时间:2019-11-24 05:28:59
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