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|7-3x| < |x+5|
-(x+5) < 7-3x < x+5
-x-5-7 < 7-7-3x < x+5-7
-x-12 < -3x < x-2
1. -3x < x-2
-3x - x < -2
-4x> -2
x> 1/2
2. -3x > -x-12
-3x+x > -12
-2x < -12
x < 6
Jadi, 1/2 < x < 6
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