Donna invested her $33,000 bonus and received a total of $970 in interest after one year. If part of the money returned 4% and the remainder 2.25%,

Donna invested her $33,000 bonus and received a total of $970 in interest after one year. If part of the money returned 4% and the remainder 2.25%, then how much did she invest at each rate?Hint: Let x represent the amount invested at 4% and y represent the amount invested at 2.25%x + y = 33,000 Using substitution method