已知y1=4x+8,y2=3x-7当x取何值时,y1和y2互为相反数

已知y1=4x+8,y2=3x-7当x取何值时,y1和y2互为相反数 已知y1=-x+3,y2=3x-4,当x取何值时,y1＜y2?急、 已知Y1=3X+2 Y2=-2X+4当X取何值时.Y1大于Y2 已知一次函数y1=-x+3与y2=3x-1,当x取何值时,y1>y2?y1=y2?y1 已知y1=2x+8,y2=6-2x.当x取何值时,y1=y2? 已知y1=3x-2,y2=3+2x.当x取何值时,y1=y2? 已知：y1=3x-2,y2=3+2x.当x取何值时,y1=y2 已知两个一次函数y1=-x+3,已知两个一次函数y1=-x+3,y2=3x-4,当x取何值时,y1>y2?当x取何值时,y1 已知y1=2x+8 y2=6-2x 当x取何值时,y1=y2 当x取何值时,y2-y1=5已知y1=2x+8 y2=6-2x 当x取何值时,y1=y2 当x取何值时,y2-y1=5 已知y1=3（5/3x-1/2),y2=4(1/2-x当想取何值时,y1=y2已知y1=3（5/3x-1/2),y2=4(1/2-x）当x取何值时,y1=y2当x取何值时,y1比y2大4?最好有想法！ 已知y1=5x-8,y2=12x+6当x取何值时,y1-1/3y2=2x 已知y1=5x-8,y2=12x+6,当x取何值时1/2y1-1/3y2=2x 已知y1=5x-8,y2=12x+6,当x取何值时,y1-1/3y2=2x? 已知y1=3x-8,y2=6x-2.当x取何值时,y1=y2?当x取何值时,y1比y2小? 已知y1=3x+2,y2=4-x.(1)当x取何值时,y1=y2?(2)当x取何值时,y1比y2大4 已知Y1=3x+2,y2=4-x.(1）当x取何值时,y1=y2?(2) 当x取何值时,y1比y2大四? ,已知y1=5x+2,y2=4-3x 当x取何值时y1=y2?当X取何值时y1比y2大5? y1=-x+3,y2=3x-4,当x取何值时y1=y2?