9-12 - Solution? Determine whether the given value is a solu- tion of the equation. 9. 4x +7 = 9x – 3 (a) x = -2 (b) x = 2 10. 1- [2 – (3 – x)] = 4x – (6 + x) (a) x = 2 (b) x = 4 11. 12. = x - 8 6 x - 4 (a) x = 2 (b) x = 4 (a) x= 4 (b) x = 8

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