Brenda bought $36 in school supplies. with a 6% sales tax, what was her total?

The equation will be 36 + (36*0.06) = x where x is the total and 36*0.06 is the addition of sales tax (% to decimal is / 100)

36*0.06=2.16

36+2.16=38.16

$38.16 is the total cost.