.......................
j) 234+[(88:4+j)-78:6]x23 = 809
[(88:4+j)-78:6]x23 = 809-234
[(88:4+j)-78:6]x23 = 575
(88:4+j)-78:6 = 575:23
(88:4+j)-78:6 = 25
22+j - 13 = 25
22+j = 25+13
22+j = 38
j = 38-22 = 16
