Jordan H.
asked • 09/12/16
Tom sold half of his comic books and then bought seven more. He now has thirteen. How many did he begin with?
Arturo O.
answered • 09/12/16
Experienced Physics Teacher for Physics Tutoring
n = number he began with
He sold half: n → n/2
Then he bought 7: n/2 → n/2 + 7
He is left with 13: n/2 + 7 = 13
Solve for n and get
n/2 = 13 - 7 = 6
n/2 = 6
n = 12
He started with 12.
Still looking for help? Get the right answer, fast.
OR
Find an Online Tutor Now
Choose an expert and meet online.
No packages or subscriptions, pay only for the time you need.
