Jinney wants to deduct the sales tax that she paid this year on her state income return. She paid $4960.80 during the year, including 6% sales tax. How much sales tax did she pay?

T = state income return (without sales tax)

106% of t = 4960.80

AKA

1.06t = 4960.80 - - > Divide both sides by 1.06 to find the state income return without sales tax

t = 4680

Subtract t from the state income return with sales tax.

4960.80 - 4680 = 160.80

She paid $160.80 in sales tax.