Question

Tìm số nguyên x, biết

(-x + 281 + 534)=449+(x - 48)

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

Answer 1

( - x + 281 + 534 ) = 449 + ( x - 48 )

=> - x + 815 = 499 + x - 48

=> - x - x = 499 - 48 - 815

=> -2x = 1266

=> x = - 633

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

=> - 754 - x = x - 12 - 741 - 23

=> - x - x = - 12 - 741 - 23 + 754

=> - 2x = - 22

=> x = 11

Answer 2

(-x+281+534 ) = 449 + ( x - 48 )

=> - x + 815 = 499 + x - 48

=> -  x - x = 499 - 48 - 815

=> - 2x = 1266

=> x = - 633

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

=>-754-x=x-12-741-23

=>-x-x=-12-741-23+754

=>-2x=-22

=>x=11