<human>:  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?
<bot>: How many marbles did Elsa have at the end of the day? ** Elsa had 40 marbles - 3 - 5 = <<40-3-5=32>>32 marbles.
How many marbles did Elsa gain? ** Elsa then gained 12 marbles + 32 = <<12+32=44>>44 marbles.
How many marbles did Elsa receive at dinner? ** At dinner Elsa received 2 * 5 marbles from Susie = <<2*5=10>>10 marbles.
How many marbles did Elsa end the day with? ** In total Elsa had 44 marbles + 10 = <<44+10=54>>54 marbles.
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