Roy buys a coat for $86.40 which includes An 8% sales tax which equation could you use to find the cost of the coat, c, without the Sales tax

Answer: 86.40  =  c  + 0.08 c  is the equation which can be used to find the cost of the coat, c, without the Sales taxStep-by-step explanation:Let us assume the cost of the coat = cSelling price of coat = $86.40The sale tax on the coat = 8%⇒ The sale tax = 8% of cCalculating the sales tax, we get:[tex]\frac{8}{100}  \times  = 0.08 c[/tex]or, the sales tax amount on the cost price of coat = 0.08 cNow, the Sales Price of coat =Cost Price of Coat + sales Tax Amount⇒ $86.40  =  c  + 0.08 cHence,  86.40  =  c  + 0.08 c  is the equation which can be used to find the cost of the coat, c, without the Sales tax.