Answer:
$7000 in first fund; $11,000 in second fund
Step-by-step explanation:
Let x = amount of money invested in first fund.
Let y = amount of money invested in second fund.
0.08x + 0.02y = 780
0.1x + 0.01y = 810
0.04x + 0.01y = 390
-0.1x - 0.01y = -810
-0.06x = -420
x = 7000
0.1x + 0.01y = 810
0.1(7000) + 0.01y = 810
0.01y = 110
y = 11000
Answer: $7000 in first fund; $11,000 in second fund