SOLUTION: Harry potter spend 2/3 of his allowance at the movies night. his mom was to sweet and let him earn 12 additional dollars for washing the car on Saturday. if Harry potter ended the

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Question 1010863: Harry potter spend 2/3 of his allowance at the movies night. his mom was to sweet and let him earn 12 additional dollars for washing the car on Saturday. if Harry potter ended the week with $19,
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Call what he started with, x.
Then x - (2/3)x + 12 = 19
(1/3)x + 12 = 19
(1/3)x = 7
x = $21