Let x = price of the bike before a sales tax.
The price after a sales tax of 8% is
x + 0.08x = 1.08x dollars
Because the price paid was $171.18, therefore
1.08x = 171.18
x = 171.18/1.08 = $158.50
Answer: 158.50
I want to say the third option but dont trust my opinion
4/3+6/9-7/3=12/9+6/9-21/9=18/9-21/9= -3/9= -1/3