Answer:
x= 3, -4
Step-by-step explanation:
0
0(4)-4(0) = 0
x+15
X stands for the number of cards the one person represent add 15 to the whatever number of cards you have.
Answer: Step 1: He distributed incorrectly.
![\left[\begin{array}{ccc}a&b\\c&d\end{array}\right] = ad-bc](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Da%26b%5C%5Cc%26d%5Cend%7Barray%7D%5Cright%5D%20%3D%20ad-bc)
