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

Question

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

Answer 1

49 - 3х = 34
3х = 49 - 34 = 15
х = 15:3
х =5

9у - 89 = 55
9у = 55+89 = 144
у = 144 : 9
у = 16

74 - 8z = 2
8z = 74 - 2
8z = 72
z = 72:8
z = 9

Answer 2

3х =49-34
3×=15
×=15÷3
×=5