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Kwame purchased a washer for $312.20. The price of the washer included sales tax of 11.5%.

Which equation can be used to find the price, p, of the washer before tax?

A.
11.5p = 312.20

B.
p + 0.115p = 312.20

C.
0.115p = 312.20

D.
p + 11.5p = 312.20