Question 1075133
0.07x = 0.04(x+1200)
0.07x = 0.04x+48
0.03x = 48
x = 1600
So, 1600 is invested at 7% and 1600+1200 = 2800 at 4%
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Check - The income from each was the same:
0.07(1600) = 112
0.04(2800) = 112
:
Happy learning,
John