A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.
- 6x + y = -54
-7x + y = -56
O Add to eliminate y.
O Subtract to eliminate x.
O Subtract to eliminate y.
-Add to eliminate x.

Kayla made observations about the sellin price of a new brand of coffee that sold in the three different sized bags she recorded those observations in the following table 6 is $2.10 8 is $2.80 and 16 is to $5.60 use the relationship to predict the cost of a 20oz bag of coffee.