Eric wants to send a package to his mother. If he chooses UPS, the fixed express fee is 10 dollars and each kilogram costs 2 dollars. For Fedex, the fixed fee is 20 dollars and each kilogram costs only 1 dollar. 1. If the total costs of the two options are the same, how many kilogram of package does Eric send? 2 If the total costs of the two options are the same, what is the cost of the package that Eric sends? Write a system of equations in order to solve this problem.