Isabella and Alexis went to the mall to buy some pants and dresses. Alexis bought 3 times more pants and dresses than Isabella. If Alexis bought 21 pairs of pants and 18 dresses, how many pairs of pants and dresses did Isabella buy in total?
How many pairs of pants did Isabella buy? ** The number of pants Isabella bought is 21 / 3 = <<21/3=7>>7 pairs of pants.
How many dresses did Isabella buy? ** The number of dresses Isabella bought is 18 / 3 = <<18/3=6>>6 dresses.
How many pairs of pants and dresses did Isabella buy in total? ** The total number of pants and dresses Isabella bought is 7 + 6 = <<7+6=13>>13.
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