70 000 - (92 225 : 1085 + x) * 208 = 2 608
70 000 - (85 + x) * 208 = 2 608
(85 + x) * 208 = 70 000 - 2 608
(85 + x) * 208 = 67 392
85 + x = 67 392 : 208
85 + x = 324
x = 324 - 85
x = 239
