Show work! dan has twice as many stickers as cam does. if dan gives cam 15 of his stickers he will still have 22 more than cam. how many stickers does each boy have? !

22+15= 37
37+37= 74
74-15=59
59-37=22

Dan= 74
Cam= 37

Let D be the number of stickers Dan has and C be the number of stickers Cam has
D=2C
D-15=C+15+22(because Dan will still have 22 more stickers after he gives Cam 15 of his, meaning Cam gains 15, Dan looses 15)
Thus D-15=C+37, D=52+C
Since D=2C, 2C=52+C
Thus Cam has 52 stickers and Dan has 104 stickers(because D=2C=2(52))

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It would take her 20 minutes.