Домножаем всё на 12
36a-6+60a+16≤12a-98
84a≤-108
a≤ -108/84
a≤ -27/21
a≤ -9/7
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Домножаем всё на 12
36a-6+60a+16≤12a-98
84a≤-108
a≤ -108/84
a≤ -27/21
a≤ -9/7