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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (2*(2.78+x)+0.8*9)*(79.79+7.8*x)/(12.78+x)/90 >1.5 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( 2 * ( 2.78 + x ) + 0.8 * 9 ) * ( 79.79 + 7.8 * x ) / ( 12.78 + x ) / 90 >1.5         (1)
        From the definition field of divisor
         12.78 + x ≠ 0        (2 )

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    From inequality(1)：
         -12.78 < x < -11.797992 或  x ＞ 3.842351
    From inequality(2)：
         x < -639/50 或  x ＞ -639/50

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    From inequalities (1) and (2)
         -12.78 < x < -11.797992 或  x ＞ 3.842351    (3)

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    The final solution set is :
         -12.78 < x < -11.797992 或  x ＞ 3.842351

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