Question

Решите уравнения!!! г и в

Answer 1

в) 3/9-4/9*х - 3 =8/15 - 1/5*х
-4/9*х +1/5*х = 8/15+3-1/3
-20/45*х+9/45*х =3 8/15-5/15
-11/45*х =3 3/15
          х = -48/15:11/15
          х = -48/11 = -4 4/11

г)  6/14 - 5/14*х -4 = - 1/3*х +8/21
     -5/14*х +1/3*х = 8/21+4 - 3/7
    -15/42*х + 14/42*х = 4 +8/21-9/21
      -1/42*х  = 3 21/21 - 1/21
      -1/42*х = 3 20/21
                х = -83/21: 1/42
                х = -166