已知y¹=4x+6 y²=3-x (1)当x取何值时,y¹已知y¹=4x+6 y²=3-x(1)当x取何值时,y¹与y²互为相反数?(2)当x取何值时,y¹比y²大4?
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![已知y¹=4x+6 y²=3-x (1)当x取何值时,y¹已知y¹=4x+6 y²=3-x(1)当x取何值时,y¹与y²互为相反数?(2)当x取何值时,y¹比y²大4?](/uploads/image/z/1758298-58-8.jpg?t=%E5%B7%B2%E7%9F%A5y%26%23185%3B%3D4x%EF%BC%8B6+y%26%23178%3B%3D3%EF%BC%8Dx+%EF%BC%881%EF%BC%89%E5%BD%93x%E5%8F%96%E4%BD%95%E5%80%BC%E6%97%B6%2Cy%26%23185%3B%E5%B7%B2%E7%9F%A5y%26%23185%3B%3D4x%EF%BC%8B6+y%26%23178%3B%3D3%EF%BC%8Dx%EF%BC%881%EF%BC%89%E5%BD%93x%E5%8F%96%E4%BD%95%E5%80%BC%E6%97%B6%2Cy%26%23185%3B%E4%B8%8Ey%26%23178%3B%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%3F%EF%BC%882%EF%BC%89%E5%BD%93x%E5%8F%96%E4%BD%95%E5%80%BC%E6%97%B6%2Cy%26%23185%3B%E6%AF%94y%26%23178%3B%E5%A4%A74%3F)
已知y¹=4x+6 y²=3-x (1)当x取何值时,y¹已知y¹=4x+6 y²=3-x(1)当x取何值时,y¹与y²互为相反数?(2)当x取何值时,y¹比y²大4?
已知y¹=4x+6 y²=3-x (1)当x取何值时,y¹
已知y¹=4x+6 y²=3-x
(1)当x取何值时,y¹与y²互为相反数?
(2)当x取何值时,y¹比y²大4?
已知y¹=4x+6 y²=3-x (1)当x取何值时,y¹已知y¹=4x+6 y²=3-x(1)当x取何值时,y¹与y²互为相反数?(2)当x取何值时,y¹比y²大4?
4x+6+(3-x)=0
4x+6+3-x=0
4x-x=-6-3
3x=-9
x=-3
当x=-3时y¹与y²互为相反数
4x+6=3-x+4
4x+x=3+4-6
5x=1
x=0.2
当x=0.2时,y¹比y²大4
1. 4x+6=-(3-x)解出来就好了