Helga went shopping for a new pair of shoes. At the first store, she tried on 7 pairs of shoes. At the second store, she tried on 2 more pairs than at the first store. At the third store, she did not try on any shoes, but she did buy a scarf.  But at the fourth store, she tried on twice as many pairs of shoes as she did at all three other stores combined, before finally choosing a pair to buy.  What is the total number of pairs of shoes Helga tried on before buying her new shoes?
How many pairs of shoes did Helga try on at the second store? ** At the second store, she tried on 7+2=<<7+2=9>>9 pairs of shoes.
How many pairs of shoes did Helga try on at the first three stores? ** Therefore, at the first three stores, she tried on 7+9+0=<<7+9+0=16>>16 pairs of shoes.
How many pairs of shoes did Helga try on at the fourth store? ** At the fourth store, she tried on 16*2=<<16*2=32>>32 pairs of shoes.
What is the total number of pairs of shoes Helga tried on before buying her new shoes? ** Thus, in total, she tried on 16+32=<<16+32=48>>48 pairs of shoes.
#### 48