友友们,帮个忙哈,有是算术题,X*0.6+X*0.4=420,帮解哈,
问题描述:
友友们,帮个忙哈,有是算术题,X*0.6+X*0.4=420,帮解哈,
友友们,帮个忙哈,有是算术题,X*0.6+y*0.4=420,帮解哈 刚才写错了,求x=?y=?
答
X*0.6+X*0.4=420
(0.6+0.4)X=420
X=420