Answer:
A = 2x - 15
Step-by-step explanation:
We are given x as the variable to represent Valerie's grade
1.. If you multiply that grade by 2 it becomes 2x
2. If you subtract 15 from the result in 1 you get 2x - 15
3. This is the equivalent of Allie's test grade
Hence
A = 2x - 15