当y1=6-x,y2=2+7x时,当x取何值时,y1与y2互为相反数?

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当y1=6-x,y2=2+7x时,当x取何值时,y1与y2互为相反数?当y1=6-x,y2=2+7x时,当x取何值时,y1与y2互为相反数?当y1=6-x,y2=2+7x时,当x取何值时,y1与y2互

当y1=6-x,y2=2+7x时,当x取何值时,y1与y2互为相反数?
当y1=6-x,y2=2+7x时,当x取何值时,y1与y2互为相反数?

当y1=6-x,y2=2+7x时,当x取何值时,y1与y2互为相反数?
y1与y2互为相反数,即y1=-y2
所以:6-x=-(2+7x)
7x+2=x-6
x=-4/3

y1=-y2;
所以: 6-x=-(2+7x)
所以: x=-4/3