Question

138 задания, пожалуйста!

Answer 1

1)84а+25а+7=443                        2) 4(9+7х)+21=393

109а+7=443                                      4(9+7х)=372

109а=436                                         9+7х=93

а=4                                                     7х=84

                                                              х=12

3) 486:(5х+2)=18                          4) 5(14+в)+6в=158

5х+2=27                                             70+5в+6в=158

5х=25                                                   11в+70=158

х=5                                                              11в=88

                                                                      в=8

Answer 2

А можно 4 уравнение по этапно?

Answer 3

84а+25а+7=443
84а+25а=443-7
84а+25а=436
(84+25)×а=436
109×а=436
а=436÷109
а=4