Question

Tìm x

- (574 + x) = (x-12-741) - 23

Answer 1

574 + x = - x + 12 + 741 + 23

2x = 776 - 574

2x = 202

x = 101

Answer 2

- ( 574 + x ) = ( x - 12 - 741 ) - 23

- 574 - x = x - 12 - 741 - 23

- x - x = - 12 - 741 - 23 + 574

-2x = -202

=> 2x = 202

      x = 202 : 2

      x = 101