x - 12 = 0x = 12
25 + x = 25x = 0
x / 108 = 1x = 108
y / 1 = 37y = 37
x * 15 = 0x = 0
x * 18 = 18x = 1
x - 12 = 0
x = 12
25 + x = 25
x = 0
x / 108 = 1
x = 108
y / 1 = 37
y = 37
x * 15 = 0
x = 0
x * 18 = 18
x = 1