Elsa started the day with 40 marbles.  At breakfast, she lost 3 marbles while playing.  At lunchtime, she gave her best friend Susie 5 marbles.  In the afternoon, Elsa's mom bought her a new bag with 12 marbles.  Susie came back and gave Elsa twice as many marbles as she received at lunch.  How many marbles did Elsa end the day with?
##Solution## Elsa had 40 marbles - 3 - 5 = <<40-3-5=32>>32 marbles.
Elsa then gained 12 marbles + 32 = <<12+32=44>>44 marbles.
At dinner Elsa received 2 * 5 marbles from Susie = <<2*5=10>>10 marbles.
In total Elsa had 44 marbles + 10 = <<44+10=54>>54 marbles.
#### 54