1 7/12 - (44/45 - (х + 5/18)) = 1 13/60,

44/45 - (х + 5/18) = 1 7/12 - 1 13/60,

44/45 - (х + 5/18) = 1 35/60 - 1 13/60,

44/45 - (х + 5/18) = 11/30,

х + 5/18 = 44/45 - 11/30,

х + 5/18 = 88/90 - 33/90,

х + 5/18 = 55/90,

х + 5/18 = 11/18,

х = 11/18 - 5/18,

х = 6/18,

х = 1/3