Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (2×(7.2+t)+0.8×10.5)×(8.7t+155.47)/(18.7+t) ≥1.6×10.5×10 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 2 × ( 7.2 + t ) + 0.8 × 10.5 ) × ( 8.7 * t + 155.47 ) / ( 18.7 + t ) ≥1.6 × 10.5 × 10         (1)
        From the definition field of divisor
         18.7 + x ≠ 0        (2 )

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    From inequality(1)：
         -18.7 ≤ t ≤ -18.352581 或  t ≥ -1.262361
    From inequality(2)：
         t < -187/10 或  t ＞ -187/10

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    From inequalities (1) and (2)
         -187/10 < t ≤ -18.352581 或  t ≥ -1.262361    (3)

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    The final solution set is :
         -187/10 < t ≤ -18.352581 或  t ≥ -1.262361

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