Value interest

Question

Jolene invests her savings in two bank accounts, one paying 3 percent and the other paying 9 percent simple interest per year. She puts twice as much in the lower yielding account because it is less risky. Her annual interest is 2235 dollars How much did she invest at each rate?

Answer 1

.03(2x) + .09x = 2235

.15x = 2235

x = 2235/.15 = amount invested at 9% = $14,900

2x = $29,800 = amount invested at 3%