i dont understand it

Question

$5,000 is invested in two different accounts yielding 3% and 3.5% interest. The amount invested in the account that yields 3% interest is $550 more than the other account. Establish the equations necessary to find the amount of money invested in each of the accounts. Let x and y represent the two amounts invested.

Answer 1

x + y = 5000

550+y + y = 5000

2y = 5000-500

2y = 4500

y = 2250 invested at 3.5%

x = 2750 invested at 3%