Question

[Le Thuy Duong]

x + 12 - 66 = 57

Answer 1

[lê hồng anh]

x + 12 - 66 = 57 

x + 12       = 57 + 66 

x + 12       =   123

x              = 123 - 12

x              =  111

Answer 2

[Tell Me My Name]

x + 12 = 57 + 66

x + 12 = 123

x         = 123 - 12

x         = 111