ok so the easy way is this
Marc says he will have 20 if he doubles his cards.
if u divide 20 by 2 = 10
but His friend gave him 3 cards before.which means that
10-3 = 7
He started with 7 cards
I answered b and c.
Answer: 7
Step-by-step explanation:
In the end if his cards are doubled to 20 then 20 / 2 = 10 and if his friend gave him 3 more cards then you would subtract 3 from 10 then that would = 7
