Решить 2 уравнения 1: 17n+14n-145=134 2: 5n+9n+32=200 .

1)17n+14n-145=134          2)5n+9n+32=200
   31n-145=134                    14n+32=200
   31n=134+145                    14n=200-32
   31n=279                           14n=168
   n=279:31                          n=168:14
   n=9                                  n=12