15/2 * х -3 *(5 + 11/18 * х) = 19
15/2*х-15-33/18*х=19
15/2*х-33/18*х=19+15=34
15*9*х-33*х=34*18
135*х-33*х=612
102*х=612
х=612:102
х=6
15/2 * х -3 *(5 + 11/18 * х) = 19
15/2*х-15-33/18*х=19
15/2*х-33/18*х=19+15=34
15*9*х-33*х=34*18
135*х-33*х=612
102*х=612
х=612:102
х=6