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Anonymous
It cannot be simplified any further so it is:
-2x - 2z - 7
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2z-28 = -26
3xz
7 - 2x
6 - x + 7 - 3x - 5 = -2x - 10 ∴ x + 3x - 2x = 6 + 7 - 5 + 10 ∴ 2x = 18 ∴ x = 9
3x+7=2x-5 x=-12