已知y1=6-x,y2=2+7x,当x取何值时,y1与y2互为相反数?此题求已知y1=6-x,y2=2+7x,当x取何值时,y1与y2互为相反数?
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![已知y1=6-x,y2=2+7x,当x取何值时,y1与y2互为相反数?此题求已知y1=6-x,y2=2+7x,当x取何值时,y1与y2互为相反数?](/uploads/image/z/6854888-56-8.jpg?t=%E5%B7%B2%E7%9F%A5y1%3D6-x%2Cy2%3D2%2B7x%2C%E5%BD%93x%E5%8F%96%E4%BD%95%E5%80%BC%E6%97%B6%2Cy1%E4%B8%8Ey2%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%3F%E6%AD%A4%E9%A2%98%E6%B1%82%E5%B7%B2%E7%9F%A5y1%3D6-x%2Cy2%3D2%2B7x%2C%E5%BD%93x%E5%8F%96%E4%BD%95%E5%80%BC%E6%97%B6%2Cy1%E4%B8%8Ey2%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%3F)
已知y1=6-x,y2=2+7x,当x取何值时,y1与y2互为相反数?此题求已知y1=6-x,y2=2+7x,当x取何值时,y1与y2互为相反数?
已知y1=6-x,y2=2+7x,当x取何值时,y1与y2互为相反数?此题求
已知y1=6-x,y2=2+7x,当x取何值时,y1与y2互为相反数?
已知y1=6-x,y2=2+7x,当x取何值时,y1与y2互为相反数?此题求已知y1=6-x,y2=2+7x,当x取何值时,y1与y2互为相反数?
6-x+2+7x=0
-x+7x=-6-2
6x=-8
x=-3/4
当x=-3/4时,
y1与y2互为相反数
y1+y2=6-x+2+7x=8+6x=0;
所以解得:x=-4/3
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