已知y1=2x+8,y2=6-2x (1)当x取何值时,y1=y2? (2)当x取何值时,y1比y2小10

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已知y1=2x+8,y2=6-2x (1)当x取何值时,y1=y2? (2)当x取何值时,y1比y2小10
已知y1=2x+8,y2=6-2x (1)当x取何值时,y1=y2? (2)当x取何值时,y1比y2小10

已知y1=2x+8,y2=6-2x (1)当x取何值时,y1=y2? (2)当x取何值时,y1比y2小10
(1)
2x+8=6-2x
4x=-2
x=-2分之1
 
(2)
2x+8+10=6-2x
2x+18=6-2x
4x=-12
x=-3