Answer:
Each question had 4 points.
Step-by-step explanation:
Let the questions be x points each. As both Gretchen and Ezia received equal scores, we can write the equation as:
18x+19=15x+31 (Let the questions be x points each)
Solving for x;
[tex]18x-15x=31-19[/tex]
=> [tex]3x=12[/tex]
Dividing both sides by 3;
x = 4
Hence, each question had 4 points.