Question 1010305
Call the amount invested in CDs, x.
Then the amount invested in bonds would x+6000.
Together $84,000 is invested, and so we write
x + x+6000 = 84000
2x + 6000 = 84000
2x = 78000
x = $39,000 in CDs so that
x+6000 = $45,000 in bonds