已知xy互为相反数,求式子3x-10+3y+Y分之5x y不等于0
人气:313 ℃ 时间:2020-03-29 19:52:59
解答
x、y互为相反数,则x+y=0 x=-y
于是
3x-10+3y+5x/y
=3(x+y)-10+5(-y)/y
=3*0-10-5
=-15
推荐
- 若xy互为相反数,则3x-10+3y与y/5x的值本别是多少 (y不等于0)
- 已知x,y互为相反数,求式子3x-10+3y+5x/y(y不等于0)
- 已知x、y互为相反数,求式子3x-10+3y+5x/y(y不等于0)的值.
- 已知xy互为相反数,求式子3x-10+3y+5x/y的值
- 已知x,y互为相反数,且xy不等于0,则3x+y分之7x+3y=?
- To suggest that the student did not do the reading
- -lg5 -lg7 怎么化成1\5 1\7
- at ease,be likely to,in general,lose face,defend aganist,turn one's back to用五句话编一个故事
猜你喜欢