Вправи 1001 - 1100 » 1081
1) (13/49 + х) - 21/49 = 19/49 13/49 + х = 19/49 + 21/49 13/49 + х = 40/49 х = 40/49 - 13/49 х = 27/49 2) 11/17 - (х + 4/17) = 1/17 х + 4/17 = 11/17 - 1/17 х + 4/17 = 10/17 х = 10/17 - 4/17 х = 6/17
1) (13/49 + х) - 21/49 = 19/49 13/49 + х = 19/49 + 21/49 13/49 + х = 40/49 х = 40/49 - 13/49 х = 27/49 2) 11/17 - (х + 4/17) = 1/17 х + 4/17 = 11/17 - 1/17 х + 4/17 = 10/17 х = 10/17 - 4/17 х = 6/17