to solve this problems we follow the steps below: 1. 2. - C = number of cakes sold - O = number of cookies sold - P = price of a cookie (in dollars) 3. - The total number of cakes and cookies sold is given by C + O = 70. - The total revenue from selling cakes is given by 10C = $200. - The total revenue from selling cookies is given by OP = $120. 4. - C + O = 70 - 10C = 200 - OP = 120 5. - Using substitution, we can solve the first equation for C and substitute it into the second equation to find the value of P. 6. Perform the necessary calculations to obtain the numerical values of the unknown variables. - Solving the system of equations, we find C = 20, O = 50, and P = $4. 7. Verify your solution by substituting the found values into the original equations and ensuring they satisfy all the conditions of the problem. - 20 + 50 = 70 (correct) - 10(20) = 200 (correct) - 4(20) = 80 (correct) 8. - The bakery sold 20 cakes and 50 cookies, and the price of each cookie is $4.