School supplies cost $27 but after tax the total was $29.96 what is the percentage of tax payed?
1 answer:
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Make denomenators the same
times left denomenator by (x+3)/(x+3) and right one by (x-9)/(x-9)
=
=
=
if expandded we get
times left denomenator by (x+3)/(x+3) and right one by (x-9)/(x-9)
if expandded we get