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1/2x-2 < 4 + 4/5x
1/2x-4/5x < 4+2
5/10x-8/10x<6
-2/10x <6
-10 (-2/10x) > -10 (6) ~>tandanya brbh soalnya dibagi min
2x>-60
x>-30
maaf kl salag. semoga bermanfaat