A Trust Account Manager Has $300,000 to Be Invested in Three

Multiple Choice

A trust account manager has $300,000 to be invested in three different accounts. The accounts pay 5%, 6%, and 8%, and the goal is to earn $18,000. Assuming that x dollars are invested at 5%, y dollars are invested at 6%, and
Z dollars are invested at 8%, find x in terms of z.

A) $x = 2 z$
B) $x = z$
C) $x = 100,000 + z$
D) $x = 300,000 - 3 z$