5(x一2)十8<6(x一l)十7

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5(x一2)十8<6(x一l)十7
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5(x一2)十8<6(x一l)十7
5(x一2)十8<6(x一l)十7

5(x一2)十8<6(x一l)十7
5x-10+8

x>-3

5(x一2)十8<6(x一1)十7
5x - 10 +8<6x-6+7
5x-2<6x+1,
左右移项得
x>-3