1) 87 / (4х + 5) = 3 87 = 3 * (4х + 5) 29 = 4х + 5 29 - 5 = 4х 4х = 24 х = 24/4 х = 62)17 * (3х - 16) = 85 3х - 16 = 5 3х = 5 + 16 3х = 21 х = 21 / 3 х = 7 3) 9 * (6х - 13) = 153 6х - 13 = 17 6х = 17 + 13 6х = 30 х = 30 / 6 х = 54) 3 * (8х + 51) = 201 8х + 51 = 67 8х = 67 - 51 8х = 16 х = 16 / 8 х = 25) (46х - 57) / 3 = 27 46х - 57 = 27 * 3 46х = 81 + 57 46х = 138 х = 138 / 46 х = 36) (19х + 62) / 15 = 13 19х + 62 = 13 * 15 19х = 195 - 62 19х = 133 х = 133/19 х = 7