Question

初二数学，分式方程

Answer 1

(1) x+3=5x, 4x=3, x=3/4

(2) x/(x-1)=(3-2x+2)/(x-1), x=5-2x, 3x=5, x=5/3

(3) 2(2x+1)=4, 4x=2, x=1/2

(4) 3x-6=x+2, 2x=8, x=4

(5) x^2-x=x^2-2x-3, x=-3

(6) 2x-5=-3, 5x=5, x=1

(7) 5x=12x+6, 7x=-6, x=-6/7

(8) 9x-3-2=5, 9x=10, x=10/9

追问

每道题的最简公分母是多少？

追答

(1) x(x+3)
(2) x-1
(3) 2x+1
(4) (x-2)(x+2)
(5) (x-3)(x-1)
(6) (x-2)或(2-x)
(7) 6x(x+1)
(8) 2(3x-1)

Answer 2

真懒