Решите уравнение 4x + 5 / 13 = 8/9
4х + 5/13 = 8/9 4х = 8/9 - 5/13 4х = 59/117 х = 59/117 : 4 х = 59/468
4х=8/9-5/13
4х=(8*12-5*9)/(9*13)
4х=(104-45)/117
4х=59/117
х=59/468