let x = the price of a pkg of white chocolate chip cookie dough, and let y = the price of a pkg of ginger bread cookie dough. (I am assuming that the first sentence should read, 'four packages of white chocolate chip cookie dough,' rather than 'white chocolate chip cookies.')
We can form the following two equations based on the info given in the problem:
4x + 7y = 119
x + 7y = 98
If we use the Elimination Method to solve this system of equations, we obtain:
3x = 21
x = 7
If x = 7, then x + 7y = 98 becomes 7 + 7y = 98
7y = 91
y = 13
The price for one pkg of white chocolate chip cookie dough is $7, and the price for one pkg of ginger bread cookie dough is $13.
