当A为何值时,式子2A+1与A+3得值满足下列条件,(1.相等)(2.互为相反数)

问题描述:

当A为何值时,式子2A+1与A+3得值满足下列条件,(1.相等)(2.互为相反数)

1.相等
2A+1=A+3
A=2
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2.互为相反数
2A+1=-(A+3)
3A=-4
A=-4/3