Question 1057008
Let B represent the amount invested in bonds, and let S represent the amount invested in stocks.


The sum of the two must equal 100,000, which gives:


B + S = 100,000


The amount of income earned is then:


0.08B - 0.05S = 3450


Solving the first equation for S gives:


S = 100,000 - B


Substituting this into the second equation gives:


0.08B - 0.05(100,000 - B) = 3450


0.08B + 0.05B - 5000 = 3450


0.13B = 3450 + 5000


0.13B = 8450


B = 8450 / 0.13


B = 65,000


<strong>The amount invested in bonds was Php 65,000.</strong>