谢谢亲们辛苦解题了,答案对的给好评哦亲!!!要全对!!跪求答案!超感谢!!!

2025-01-02 00:31:56
推荐回答(1个)
回答1:

(1)解:6y+1=5+2y
4y=4
y=1
x=7
(2)解:把y=x-3代入,得
3x+2(x-3)= -1
5X-6= -1
X=1
y= -2
(3)解:y=3-x
把y=3-x代入,得
2x-(3-x)=6
x=3
y=0
(4)解:x= -1-3y
把x= -1-3y代入,得
3(-1-3y)-2y=8
y= -1
x=2