SOLUTION: An investment of Php 100 000 earned a net income of Php 3 450 in one year. Part of the investment was in bonds and earned an income at a rate of 8%. The rest of the investment was
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Question 1057008: An investment of Php 100 000 earned a net income of Php 3 450 in one year. Part of the investment was in bonds and earned an income at a rate of 8%. The rest of the investment was in stocks and lost money at a rate of 5%. How much was invested in bonds?
Found 2 solutions by ikleyn, solve_for_x:
Answer by ikleyn(52776) (Show Source): You can put this solution on YOUR website!
Answer by solve_for_x(190) (Show Source): You can put this solution on YOUR website!
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
The amount invested in bonds was Php 65,000.
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