Question

/x-1/=/2x-5/

Answer 1

|x - 1| = |2x - 5|

x - 1 = 2x - 5

x = 2x - 5 + 1

x = 2x - 4

2x - x = 4

x = 4 

Answer 2

ban lam thieu roi

Answer 3

|x-1| = |2x-5|

=> x-1 = 2x-5 hoặc -x-1 = -2x-5

Nếu x-1 = 2x-5

=> x = 2x-5+1

=> x = 2x-(5-1)

=> x = 2x-4

=> 2x-x = 4

=> x = 4.

Nếu -x-1 = -2x-5

=> -x = -2x-5+1

=> -x = -2x-(5-1)

=> -x = -2x-4

=> -2x-(-x) = 4

=> -x = 4

=> -4 = x

=> x = -4.

Vậy x = 4 hoặc x = -4.