<PRE><B>Question 1114761</B>
let x be the amount invested at 5%, then
:
0.07(x-760) + 0.05x = 51.20
:
0.07x-53.20 +0.05x = 51.20
:
0.12x = 104.40
:
x = 870
:
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Alvin invested $870 at 5% and $110 at 7%
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:

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