Question 54023
Number ~> a b c
a = 3 because 300 < a < 400
3 b c
300 + 10b + c = 40(3 + b + c)
300 + 10b + c = 120 + 40b + 40c
180 = 30b + 39c
and ~>
b = c + 6
plug ~>
180 = 30(c + 6) + 39c
180 = 30c + 180 + 39c
0 = 69c
0 = c
plug ~>
b = c + 6
b = 0 + 6 = 6
Number ~> 360