256 - 66 * 1/3 = (66 + 90)(x - 1/3)
256 - 22 = 66x + 90x - 22 - 30
156x = 286
x = 286/156 = 143/78
х/66 - (256 - х)/90 = 1/3 ////*3
х/22 - (256 - х)/30 = 1
30х - 256*22 + 22х = 22
52х = 255 * 22
х = 255 * 22/52 = 5610/ 52 = 107 23/26
256 - 90х =66х + 22
234 = 156х
117/78 = х