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"Investment" Word Problems: Examples (page 2 of 2) If you set up your investment word problems so everything is labeled and wellorganized, they should all work out fairly easily. Just take your time and do things in an orderly fashion. I've done the setup (but not the complete solutions) for a few more examples:
First I fill in the P, r, and t columns with the given values. Then I multiply across the rows (from the right to the left) in order to fill in the I column. Then add down the I column to get the equation 150 + 0.09 x = (3,000 + x)(0.075). To find the solution, I would solve for the value of x.
In this problem, I don't actually need the "total" row at all. First I'll fill in the P, r, and t columns, and multiply to the left to fill in the I column. From the interest column, I then get the equation 0.09x = ($6,000 – x)(0.06), because the yields are required to be equal. Then I'd solve for the value of x, and backsolve to find the value invested in the 6% account. (This exercise's setup used that "how much is left" construction, mentioned earlier.)
The amount invested in the CD is defined in terms of the amount invested in the mutual fund,so I will let "x" be the amount invested in the mutual fund.
In this problem, I don't actually need the "total" for the "rate" or "time" columns. First I'll fill in the P, r, and t columns, multiplying to the left to fill in the I column. Then I'll add down the I column to get the equation 0.09x + (x + 2,500)(0.05) = 475. Then I'd solve for the value of x. Copyright © Elizabeth Stapel 19992011 All Rights Reserved
For this problem, I'll let "x" stand for the total amount invested.
Once 30% and 25% was accounted for in the 6% and 8% accounts, then there is 100% – 30% – 25% = 45% left for the third account. I can use this information to fill in the "principal" column. Then I'll fill out the "rate" and "time" columns, and multiply to the left to fill in the "interest" column. From the interest column, I get the equation 0.018x + 0.02x + 0.03375x = 35,875. Then I'd solve for the value of x. << Previous Top  1  2  Return to Index



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