помогите умоляю 49-3х=34 9у -89=55 74-8z=2

49 - 3х = 343х = 49 - 34 = 15х = 15:3х =59у - 89 = 559у = 55+89 = 144у = 144 : 9у = 1674 - 8z = 28z = 74 - 28z = 72z = 72:8z = 9

3х =49-343×=15×=15÷3×=5