[tex]\displaystyle\bf\\2)\\\\-1 < 3-4x < 5\\\\-1-3 < 3-4x-3 < 5-3\\\\-4 < -4x < 2 \ |:(-4)\\\\-0,5 < x < 1\\\\\boxed{x\in(-0,5 \ ; \ 1)}\\\\\\3)\\\\-28x < 7 \ |:(-28)\\\\x > -0,25\\\\\boxed{x\in(-0,25 \ ; \ +\infty)}\\\\\\5)[/tex]
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---------------( - 9)_________[8]__________
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[tex]\displaystyle\bf\\x\in\Big(-9 \ ; \ 8\Big][/tex]
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[tex]\displaystyle\bf\\2)\\\\-1 < 3-4x < 5\\\\-1-3 < 3-4x-3 < 5-3\\\\-4 < -4x < 2 \ |:(-4)\\\\-0,5 < x < 1\\\\\boxed{x\in(-0,5 \ ; \ 1)}\\\\\\3)\\\\-28x < 7 \ |:(-28)\\\\x > -0,25\\\\\boxed{x\in(-0,25 \ ; \ +\infty)}\\\\\\5)[/tex]
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---------------( - 9)_________[8]__________
///////////////////////////////////////
[tex]\displaystyle\bf\\x\in\Big(-9 \ ; \ 8\Big][/tex]