SOLUTION: kiko walks dogs in her neighborhood to earn money. Today she spends 15 extra minutes with the dogs, spending twice as much time as she did yesterday. How many minutes did she spend

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Question 1078530: kiko walks dogs in her neighborhood to earn money. Today she spends 15 extra minutes with the dogs, spending twice as much time as she did yesterday. How many minutes did she spend walking the dogs yesterday?
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
x = number of minutes she spent yesterday
x + 15 = number of minutes she spend today.

the number of minutes she spent today is twice the number of minutes she spent yesterday.

x + 15 = 2x

subtract x from both sides to get 15 = x

she spent 15 minutes yesterday.

she spent 30 minutes today.

30 minutes is 15 minutes more then 15.

30 minutes is twice 15 minutes.