已知|x+4|与|2-7|互为相反数,求x+y的值.-
|2y-7|!
人气:372 ℃ 时间:2020-09-18 16:02:48
解答
我把题改为
已知|x+4|与|2-y|互为相反数,求x+y的值.
因为|x+4|与|2-y|都是非负数且互为相反数,所以x+4=0,2-y=0
可得x=-4,y=2
x+y=-4+2=-2
推荐
- 已知|x+2|与|Y+7|互为相反数,求-X+y的值
- 已知-[-(-a)]=2,求a的相反数.若a-2和-7互为相反数,求a的值.若x,y互为相反数,求2010分之x+y的值.
- 若|x+4|与|y-7|互为相反数,求(-x+1)×(y-4)的值
- 已知|x-2|与|y+7|互为相反数,求x+y的值.
- 若|-x|=4,则x=( );若|x-3|=0,则x=( ) 已知a的相反数是-7/9,求|1+a|的值.若|a-8|+|b-5|=0,求a-b的
- 初一英语中译英:她在早餐会吃一个鸡蛋和一些牛奶.
- One still has to work hard and steadily at one's own subjects or work 什么意思
- _______(believe)that he is alone,the man began to express his thoughts aloud
猜你喜欢