Brute forces a math sum with multiple blanks

blank_finder_brute_force.py

import itertools

side_a = "(a+b)/c==d"

v = [-9,-2,8,-7]

for p in itertools.permutations(v,len(v)):
    side_a_m = side_a
    for i,v in enumerate(p):
        side_a_m=side_a_m.replace(chr(i+97),"("+str(v)+")")
    if eval(side_a_m):
        print(side_a_m,eval(side_a_m))