A
{36x+12-36x-27≥3x⇒3x≤-15⇒x≤-5
{(x-2)(x+9)<0 x=2 x=-9 ⇒-9<x<2<br> //////////////////////////////////////
-----(9)-----------[-5]------------(2)-----------
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x∈(-9;-5]
б
{(10-2x)/[3+(5-2x)²] 3+(5-2x)²>0⇒10-2x≥0⇒2x≤10⇒x≤5
{2-7x≤14-3x⇒-7x+3x≤14-2⇒-4x≤12⇒x≥-3
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------------[-3]---------------------------{5]--------------
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x∈[-3;5]
в
{(24-3x)/[8+(5-2x)²]≥0 ,8+(5-2x)²>0⇒24-3x≥0⇒24-3x≥0⇒x≤8
{-9x+2x≤43-22⇒-7x≤21⇒x≥-3
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---------[-3]--------------------------[8]-----------
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x∈[-3;8]