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4 (2x+15) ≥ (-x-12)
8x + 60 ≥ -x - 12
8x+x ≥ -12 - 60
9x ≥ -72
x ≥ -72/9
x ≥ -8
Hp {-8, -7, -6,...}
8x+60>= (-x-12)
9x>=-72
x<=-8