. Mary has a total of $5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was $331. Write and solve a system of equations to find out how much she has invested in both accounts

Question

.  Mary has a total of $5000 invested in two accounts.  One account pays 5% and the other 8%.  Her interest in the first year was $331.  Write and solve a system of equations to find out how much she has invested in both accounts

anonymous · Answer

Amount invested in 5% account  = x
Amount invested in 8% account = y

Solve the following two simultaneous equations:
0.05x + 0.08y = 331 (total interest)
x + y = 5000   (total invested)