1)37/76 - (69/76 - х) = 15 /76  2) (х- 12/63)- 38/63 = 4/63  3)5/18 + (15/18 - (х-7/18)) = 11/18     4) 18/19 - ( 8/19 + ( 14/19 - х)) = 2/19 это уровнение с дробями помогите 

1) 37/76 - (69/76 - х) = 15 /76 37/76 - 69/76 +х = 15 /76 -32/76+х = 15 /76 х = 15 /76 + 32/76 х =47 /76 2) (х- 12/63)- 38/63 = 4/63 х- 12/63- 38/63 = 4/63 х- 50/63 = 4/63 х =  4/63 + 50/63 х =  54/63=6*9/7*9 х =  6/7 3) 5/18 + (15/18 - (х-7/18)) = 11/18 5/18 + 15/18 - х + 7/18 = 11/18 27/18 - х = 11/18 27/18 - 11/18 = х 16/18 = х х = 8/9 4) 18/19 - ( 8/19 + ( 14/19 - х)) = 2/19 18/19 -  8/19 -( 14/19 - х)) = 2/19 18/19 -  8/19 - 14/19 + х = 2/19 10/19 - 14/19 + х = 2/19 х = 2/19 + 14/19 - 10/19 х = 6/19