Answer:
x (Deeply sorry if it's wrong i just had blood drawn and my brain won't cooperate)
Explanation:
(4 + 8x) - (4 - 4x)
(4 + 8x) - 4(1 - x)
4(1 + 2x) - 4(1 - x)
1 + 2x - 1 - x
2x - x
1x
x
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