1)(39+x)-84=78 3)(600-x)-92=126 4)253-(x-459)=138 2)(x-83)+316=425 5)502-(217-x)421 3)(600-x)-92=126 6)871-(x+157)=385 решите уравнение ( если можете с действиями

1) (39+х)-84=78                   4)253-(x-459)=138
39+х=162                              х-459=115
х=162-39                               х=459+115
х=123                                    х=574

3))(600-x)-92=126                2)(x-83)+316=425
600-х=218                             х-83=425-316
х=600-218                             х-83=109
х=382                                    х=109+83
                                              х=192

5)502-(217-x)=421               6)871-(x+157)=385
217-х=502-421                     х+157=871-385
217-х=81                              х+157=486
х=217-81                              х=486-157
х=136                                   х=329

(39+х)-84=78                           

39+х=78+84
39+х=162
х=162-39
х=123
(39+123)-84=78

(600-х)-92=126
600-х=126+92
600-х=218
х=600-218
х=382
(600-382)-92=126

253-(х-459)=138
х-459=253-138
х-459=115
х=115+459
х=574
253-(574-459)=138
 

(х-83)+316=425
х-83=425-316
х-83=109
х=109+83
х=192
(192-83)+316=425

(600-х)-92=126
600-х=126+92
600-х=218
х=600-218
х=382
(600-382)-92=126

871-(х+157)=385
х+157=871-385
х+157=486
х=486-157
х=329
871-(329+157)=385