Stan invests $5000, some at 6% interest and the rest at 4.5% interest. If x is the amount he invests at 6%, then the amount invested at 4.5% can be expressed as
A.045x.
B10.5x.
C5000 - x.
D5000 + x.
A.045x.
B10.5x.
C5000 - x.
D5000 + x.