Question

  Giai nhanh giup minh bai nay :

        96 - 3 ( x + 1 ) = 42

Answer 1

96 - 3(x+1 ) = 42

=> 3(x+1) = 96 - 42 = 54

=> x + 1 = 54 : 3 = 18

x + 1 = 18

=> x = 17

Answer 2

96 - 3 ( x + 1 ) = 42

      3 ( x + 1 ) = 96 - 42

     3 (x + 1 ) = 54

         x + 1  = 54 : 3

         x + 1  = 18

         x        = 18 - 1

         x        = 17