HOW DO I FIND SALES TAX?

Question

elka pays $1187.20 for a computer. If the price paid includes a 6% sales tax, what is the price of the computer itself?

Answer 1

$1187.2=106% of some number, 100% for the computer and 6% for the tax

1187.2=1.06*P

1187.2/1.06=P

P=$1120.00 for the price of the computer

6%*1120=0.06*1120=$67.20

check:

$1120.00+$67.20=$1187.20

Answer 2

Let X be the cost of the computer itself. The total price is cost plus tax and the tax is 6% (0.06) of the cost.

So, X + 0.06 X = 1187.20, 1.06 X = 1187.20, X = $1120.00.

Check: 11.20 X 6% = 67.20, then 67.20 + 1120.00 = 1187.20