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jarptica [38.1K]
3 years ago
7

Susan invests

Mathematics
1 answer:
Arturiano [62]3 years ago
5 0
Let f=amount invested at 4% and e=amount invested at 8%

0.04f+.08e=800

However, e=2f so the above equation becomes:

0.04f+0.08(2f)=800

0.04f+0.16f=800

0.2f=800

f=$4000, since e=2f

e=$8000

So Susan invested $4000 at 4% and $8000 at 8%.
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