Question 1068367
0.07x+0.09(x+400) = 68
0.07x+0.09x+36 = 68
0.16x = 32
x = 200
Tyler has 200 invested at 7% and 200+400= 600 invested at 9%
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Check:
0.07 * 200 = 14
0.09 * 600 = 54
Total . . .  68 Correct