How much did he invest at each rate

Question

Nico is saving money for his college education. He invests some money at 5% and $2000 less than that amount at 3% the investments produced a total of $156 interest in 1 yr how much did he invest at each rate

3%

5%

Answer 1

.05x + .03(x-2000) = 156

.08x = 156 + 60

x = 216/.08 = $2700 at 5%

$700 at 3%