Question

Помогите решить уравнение!!!!!!!!! -3/7a+5/6a-8/21a=-1/49

Answer 1

- 3/7а + 5/6а - 8/21а = - 1/49
- 18/42а + 35/42а - 16/42а = - 1/49
1/42а = - 1/49
а = - 1/49 : 1/42
а = - 42/49
а = - 6/7

Answer 2

-3/7a+5/6a-8/21a= -1/49
-18/42a+35/42a-16/42a= -1/49
17/42a-16/42a= -1/49
1/42a= -1/49
a= (-1/49):1/42
a=(-1/49)*42/1
a= -6/7