The average of 7 numbers is 7. If you take one of these numbers and change it to 9, the average is 8. What was the original number before changing?
7 7 [OP_MUL] 7 8 [OP_MUL] 9 [OP_SUB] [OP_SUB]
var_a = 7
var_b = 7
var_c = var_a * var_b
var_d = 7
var_e = 8
var_f = var_d * var_e
var_g = 9
var_h = var_f - var_g
var_i = var_c - var_h
print(int(var_i))