Greg invested his savings in two investment funds. The amount he invested in Fund A was

3
times as much as the amount he invested in Fund B. Fund A returned a
6%
profit and Fund B returned a
7%
profit. How much did he invest in Fund B, if the total profit from the two funds together was
$2250
?

1 answer

amount in B -- x
amount in A -- 3x

.06(3x) + .07x = 2250
.18x + .07x = 2250
.25x = 2250
x = 9000

so $9000 in B and $27,000 in A