Forex Investments

Question: Forex Macro makes investments for corporate clients.?
It makes an investment of $3700 for one year at simple interest, yielding $297. Part of the money is invested at 7% and the rest at 9%. How much was invested at each rate?
10 points to the correct answer! Thanks!
Answer: Let x = amt invested at 9 %
3700 – x = amt invested at 7%
.09x + .07(3700 – x) = 297
.09x + 259 – .07x = 297
.09x – .07x = 297 – 259
.02x = 38
x = 38/.02 = $1900 amt invested at 9 %
3700 – 1900 = $1800 amt invested at 7%
FINANZAS FOREX INVESTMENTS