If the son's age is 1 year less than 1/4 of the father's age and the father's age is 5 years less than 5 times the son's age, how old is the son?
1/4 5 [OP_MUL] 1 [OP_ADD] 1/4 5 [OP_MUL] 1 [OP_SUB] [OP_DIV]
var_a = 0.25
var_b = 5
var_c = var_a * var_b
var_d = 1
var_e = var_c + var_d
var_f = 0.25
var_g = 5
var_h = var_f * var_g
var_i = 1
var_j = var_h - var_i
var_k = var_e / var_j
print(int(var_k))