a: \(\dfrac{7x-8}{32}-\dfrac{5-x}{16}>\dfrac{x+9}{2}+\dfrac{1}{8}\)
=>\(\dfrac{7x-8}{32}+\dfrac{x-5}{16}>\dfrac{16\left(x+9\right)+4}{32}\)
=>\(7x-8+2\left(x-5\right)>16\left(x+9\right)+4\)
=>9x-18>16x+144+4
=>-7x>148+18=166
=>\(x< -\dfrac{166}{7}\)
b: \(\dfrac{1-2x}{4}-2< \dfrac{1-5x}{8}\)
=>\(\dfrac{2\left(1-2x\right)}{8}-\dfrac{16}{8}< \dfrac{1-5x}{8}\)
=>2(1-2x)-16<1-5x
=>2-4x-16<1-5x
=>-4x-14<1-5x
=>-4x+5x<1+14
=>x<15
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