2. Решите уравнение: 1) x+ 53 = 97 2) 142 – x = 76.

1) x+53 = 97 x = 97-53 x = 44 2) 142-x = 76 -х = 76-142 -x = -66

х+53=97                                                                142-х=76х=97-53                                                                 х=142-76х=40                                                                      х=66---------------------                                                     ------------------------40+53=97                                                              142-66=76      97=97                                                                      76=76