Answer:
$3
Step-by-step explanation:
at $2 each 9 bars would be $18
at 3/$5, 9 bars would be $15
because 9bars /3bars per set=3 sets & 3 sets of 3 at $5 is $15
the Answer is 3x+12)+X=180
99 ÷ 9 equal 11
99 ÷ 9 = 11. yeah
-9 Would be the answer I would believe.