Answer:
x = 8
Explanation:
|20 + 2x| = |4x + 4|
|20 + 2x| = |4 + 4x|
|20 - 2x| = |4|
|-2x + 20| = |4|
-|2x| = |-16|
|-x| = |-8| = |x| = |8|
Chow,...!
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