Розвяжіть рівняння 1) 6х+8х-7х=714 2) 23х-19х+5х=1827 3)11х-6х+17=2042 4) 5х+3х-47=6401

Question

Розвяжіть рівняння 1) 6х+8х-7х=714 2) 23х-19х+5х=1827 3)11х-6х+17=2042 4) 5х+3х-47=6401

Answer 1

1)6х+8х-7х=714                                           3)11х-6х+17=2042

   7х=714                                                        5х=2042-17

    х=714:7                                                      5х=2025

    х=102                                                          х=2025:5     

                                                                         х=405

 

2)23х-19х+5х=1827                                       4)5х+3х-47=6401

   9х=1827                                                        8х=6401+47

    х=1827:9                                                      8х=6448

    х=203                                                           х=6448:8

                                                                        х=806