Subtract-2x2 - 4x from 2x2 – 2x - 5.

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

How do you write 0.5% as a fraction