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A = { ..., -2, -1, 0 }
5(3) - 4a > 7/2 (3) - 1/2 + a(3)
Menjadi:
15 - 4a > 21/2 - 1/2 + 3a
15 - 4a > 10 + 3a
-4a - 3a > 10 - 15
Menjadi:
-7a > -5
Kalikan dengan -1, tanda dibalik.
7a < 5
a < 5/7