<PRE><B>Question 515509</B>
Samantha invested her $10,000 savings at two different banks for one year. She put part of the money in Bank A which paid 8% interest. The rest of the money was invested at 7% at Bank B.At the end of the year she had accumulated $735 in interest. How much money did she invest at Bank A? 
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Using one variable.
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Interest Equation:
Interest + Interest = Interest 
0.08x + 0.07(10,000-x) = 735
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Multiply thru by 100 to get:
8x + 7*10,000 - 7x = 73500
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x = 73500-70,000
x = $3500 (Amount invested at Bank A)
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Cheers,
Stan H.
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