Problema Solution
A businessman invested part of Php2,000,000 at 12% and the rest at 15%. If both investment gave him Php250,000 per annum, how much was each investment?
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Solution:
x = investment @ 12%
y = 2000000 - x = investment @ 15%
0.12x + 0.15(2000000-x) = 250000
0.12x + 300000 - 0.15x = 250000
-0.03x = -50000
x = Php 1,666,666.67
y = 2000000-1666666.67
y = Php 333,333.33