Question

1, tìm x biết 

a, 5*x + x = 39- 177147 : 19683

b, / x - 4 / = 12 + ( - 5 )

bạn nào trả lời đúng và đầu tiên thì mình tick cho nhé .

Answer 1

a) 5 . x + x = 39 - 177147 : 19683                                                                              b) |x - 4| = 12 + (- 5)

   5 . x + x = 39 - 9                                                                                                       |x - 4| = 12 - 5

   5 . x + x = 30                                                                                                            |x - 4| = 7

         6 . x = 30                                                                                TH1: x - 4 = - 7                                    TH2: x - 4 = 7

              x = 30 : 6                                                                                        x = - 7 + 4                                          x = 7 + 4

              x = 5                                                                                               x = - 3                                                x = 11