Question

[The Joker AD]

tìm x thuôc Z

(10-x)+48=40-(2-x)

Answer 1

[Obito Kiên]

(=)58-x=38+x
(=)20=2x

(=)x=10(tm) :))))

Answer 2

[Nguyễn Thị Hải Yến]

( 10 - x ) + 48        = 40 - ( 2 - x )

( 10 - x ) + ( 2 - x ) = 40 - 48

 10 - x    +   2 - x   = -8

( 10 + 2 ) - x          = -8

  12         - x          = -8

                 x          = 12 + 8

                 x           = 20

Vậy x = 20