Isabella has twice as much money invested at 4% as she has invested at 3%, and she has $500 more invested at 5% than she has at
3%. If the annual income from these three investments is $2025, how much does she have invested at 4%
1 answer:
Invested at 3% = x
invested at 4% = 2x
invested at 5% = x+500
0.03x + 0.04(2x) + 0.05(x+500) = 2025
0.03x + 0.08x +0.05x +25 = 2025
0.16x = 2000
x= 12,500
4% = 2x = 12,500 * 2 = $25,000
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