Walt made an extra $9000 last year from a part-time job. He invested part of the money at 10% and the rest at 7%. He made a total of $780 in interest. How much was invested at 7%?
A)$7000
B)$4000
C)$4500
D)$5000

Question

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The Answer of Walt made an extra $9000 last year from a part-time job. He invested part of the money at 10% and the rest at 7%. He made a total of $780 in interest. How much was invested at 7%?
A)$7000
B)$4000
C)$4500
D)$5000

Walt Made an Extra $9000 Last Year from a Part-Time