Answer:
666
Step-by-step explanation:
666
666
666
666
666
666
666
666
66
6
6
6
56
6
6
6
The total value would be the amount he put in plus the amount he earns in interest. The answer should be 424
-7 - 3x = 9x(x + 2)
Standard Form:
-9x^2 - 21x - 7 = 0