There is a red tissue and a blue tissue. If the red tissue is 12 centimeters (cm) longer than the blue tissue, and twice the length of the red tissue equals three times the length of the blue tissue, find the length of the blue tissue.
12 1 1 3 [OP_DIV] 2 [OP_MUL] [OP_SUB] [OP_DIV] 3 [OP_DIV] 2 [OP_MUL]
var_a = 12
var_b = 1
var_c = 1
var_d = 3
var_e = var_c / var_d
var_f = 2
var_g = var_e * var_f
var_h = var_b - var_g
var_i = var_a / var_h
var_j = 3
var_k = var_i / var_j
var_l = 2
var_m = var_k * var_l
print(int(eval('{:.2f}'.format(round(var_m+1e-10,2)))))