What's the answer to these math problems? how did you solve it?

Me. drysdale earned 906.25 in interest in one year on money that he had deposited in his local bank if the bank paid an interest rate of 6.25% how much money did mr. drysdale deposit

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Solve 2x+y=3 x+y=5 in substitution method