Ralph L. answered • 09/30/13

Algebra I, II, Visual Basic, Beginning C++ tutor

Let F be the cost of one lady finger

Let C be the cost of on cookie.

so,

F + 6C = 3.05 eq. 1

2F + 4C = 2.50 eq. 2

use eq. 1 to solve for F:

F = 3.05 - 6C eq. 3

subsitute eq. 3 to eq. 2

2(3.05 - 6C) + 4C = 2.50

6.10 - 12C + 4C = 2.50

6.10 - 8C = 2.50

6.10 - 2.50 = 8C

3.60 = 8C

so C = $.45

so, each cookie costs

**45¢**