2x -10
1) Gathering the data
Davions grade: X
Ann Marie: 2x -10 10 less than twice Davions grade
2) To find out the Ann Maries grade, let's firstly find out the value of x. We can do it by equating those expressions:
2x -10 = x Subtract x from both sides
2x - x = 10
x=10
So now, we can plug into Ann Marie's formula the quantity of x
Ann Marie: 2x -10
2(10) -10
20-10
10 Ann Marie's grade
3) Hence, the expression that gives us Ann Marie's grade is 2x -10
