Question

7-9x/2-3x -4x-5/2-3x =1 x=?

Answer 1

(7-9x)/(2-3x) -(4x-5)/(2-3x) =1

[(7-9x) -(4x-5)]/(2-3x) =1

(7-9x -4x+5)/(2-3x) =1

(12-13x)/(2-3x) =1

(12-13x)/(2-3x) -1=0

[(12-13x)-(2-3x) ]/(2-3x) =0

(12-13x-2+3x)/(2-3x) =0

(10-10x)/(2-3x) =0

10(1-x)/(2-3x) =0

(1-x)/(2-3x) =0

1-x=0

x=1

经检验x=1是方程的解