Hi there! ~
So lets get right into this equation.
First off is says "She could take Valerie's grade, multiply it by 2 and subtract 15"
We are going to use this sentence of information to determine our final answer.
We don't know Valerie's actual grade, so lets label it as, x.
Now it says we have to multiply Valerie's unknown grade (x) and multiply it by 2.
So we get 2x (Or, 2*x)
Now we "subtract by 15"
So
2x - 15
Is our final answer.
(C)
