Реши уравнение 31/42 - (y+9/42)=15/42Срочно!!!!

31/42-15/42=у+9/42 16/42=у+9/42 у=16/42-9/42 у=7/42 у=1/6

31/42 - ( у + 9/42 ) = 15/42 31/42 - ( 42/42у + 9/42 ) = 15/42 31 - ( 42у + 9 ) = 15 31 - 42у - 9 = 15 22 - 42у = 15 42у = 22 - 15 у = 7/42 у = 1/6