如果x=-1是方程a(5x-1)-1/4(3-x)=6a(x-1),求a=?
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![如果x=-1是方程a(5x-1)-1/4(3-x)=6a(x-1),求a=?](/uploads/image/z/11968531-43-1.jpg?t=%E5%A6%82%E6%9E%9Cx%3D-1%E6%98%AF%E6%96%B9%E7%A8%8Ba%EF%BC%885x-1%EF%BC%89-1%2F4%283-x%29%3D6a%28x-1%29%2C%E6%B1%82a%3D%3F)
如果x=-1是方程a(5x-1)-1/4(3-x)=6a(x-1),求a=?
如果x=-1是方程a(5x-1)-1/4(3-x)=6a(x-1),求a=?
如果x=-1是方程a(5x-1)-1/4(3-x)=6a(x-1),求a=?
如果x=-1是方程a(5x-1)-1/4(3-x)=6a(x-1),
=>-6a-1=-12a
=>6a=1
=>a=1/6
把 x = ﹣1 带入方程得
a [ 5 × ( - 1) - 1 ] - 1/4 [ 3 - ( - 1 )] = 6a(- 1 - 1)
即 - 6 a - 1 = - 12 a
解得 a = 1/6