Question 1204040
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Chris invested his savings in two investment funds. The $4000 that he invested in Fund A returned a 2% profit. The amount that he invested in Fund B returned a 7% profit. How much did he invest in Fund B, if both funds together returned a 5% profit?

Let amount invested in Fund B, be B

Amount invested in Fund A: $4,000, so profit from Fund A investment = .02(4,000) 
Amount invested in Fund B: B, so profit from Fund B investment = .07B
Since overall profit from the 2 investments was 5%, we get the following Return on Investment
(ROI) equation: .02(4,000) + .07B = .05(4,000 + B)
                        80 + .07B = 200 + .05B
                      .07B - .05B = 200 - 80
                             .02B = 120
 Amount invested in Fund B, or {{{highlight_green(matrix(1,7, B, "=", 120/.02, ", or", "12,000"/2, "=", highlight(highlight_green(highlight("$6,000")))))}}}</pre>