2x-y+3=0,则6x-3y+5=(  )知道的告诉我,让我明白为什么,谢谢

2025-01-20 11:58:42
推荐回答(2个)
回答1:

2x-y+3=0
2x-y=-3
6x-3y=3(2x-y)=-9
6x-3y+5=-4

回答2:

2x-y+3=0
2x-y=-3

6x-3y+5
=3(2x-y)+5
=-3×3+5
=-4