let x represent the number of cups of additional cups of sugar and y represents the total number of pies she can bake.
Given that;
"Laura has already baked 9 pies, and she can bake 2 pies with each additional cup of sugar she buys"

With 14 additional cups of sugar;

substituting the value of x;

Therefore, the total number of pies Laura can Bake with 14 additional cups of sugar is;
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