Question 826020
Mr. Perez invested 4,500 pesos more at 3% than what he invested at 6%. His annual income for the 2 investments is equivalent to a return at 4%of the entire sum. How much did he invest at each rate? 
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Quatity:: t = s+4500
Interest: 3t + 6s = 4*4500
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Modify:
3t - 3s = 3*4500
3t + 6s = 4*4500
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Subtract and solve for "s":
9s = 4500
s = $500 (amt. invested at 6%)
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Solve for "t"
t = s + 4500
t = $5000 (amt. invested at 3%)
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Cheers,
Stan H.
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