Question 662100
.09x + .06y = 492
x+y=7200
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Substitution
.09(7200-y) + .06y = 492
648 - .09y + .06y = 492
648 - 492 = .09y - .06y
156 = .03y
5200 = y = $ at 6%
7200 - 5200 = 2000 = x = $ at 9%
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$5200 at 6%
$2000 at 9%