Помогите пожалуйста 2 и 4 прошу........сфоткайте пожалуйста

[latex]2)\; \; |2x-1|+|x-3| \leq 4\\\\Znaki\; (2x-1):\; \; ---(\frac{1}{2})++++++++\\\\Znaki\; (x-3):\; \; \; --------(3)++++\\\\a)\; x \leq \frac{1}{2}\; \to \; \; |2x-1|=-(2x-1)\; ,\; |x-3|=-(x-3)\\\\-2x+1-x+3 \leq 4\; ,\; \; \; -3x \leq 0\; ,\; \; x \geq 0\; \; \to \\\\x\in [\, 0,\frac{1}{2}\, ]\\\\b)\; \frac{1}{2}\ \textless \ x \leq 3\; ,\; |2x-1|=2x-1\; ,\; \; |x-3|=-(x-3)\\\\2x-1-x+3 \leq 4\; ,\; \; \; x \leq 2\; \; \to \\\\x\in (\frac{1}{2},2\, ]\\\\c)\; x\ \textgreater \ 3\; ,\; \; |2x-1|=2x-1\; ,\; |x-3|=x-3[/latex]  [latex]2x-1+x-3 \leq 4\; ,[/latex]  [latex]3x \leq 8,\; \; x \leq \frac{8}{3}\; ,\; \; x \leq 2\frac{2}{3}\; ,\; 2\notin (3,+\infty )\; \; \to [/latex]    [latex]x\in \varnothing \\\\Otvet:\; \; x\in [\, 0,\frac{1}{2}\, ]\cup(\frac{1}{2},\, 2]\; \; \to \; \; x\in [\, 0,2\, ]\, .[/latex] [latex]2)\; \; \sqrt{x+27}\ \textgreater \ x-3\; \; \to\\\\ \left \{ {{x-3 \geq 0} \atop {x+27\ \textgreater \ (x-3)^2}} \right. \; \; \; ili\; \; \; \left \{ {{x-3 \leq 0} \atop {x+27 \geq 0}} \right. \\\\ \left \{ {{x \geq 3} \atop {x^2-7x-18\ \textless \ 0}} \right. \; \; \; ili\; \; \; \; \left \{ {{x \leq 3} \atop {x \geq -27}} \right. \\\\ \left \{ {{x \geq 3} \atop {(x+2)(x-9)\ \textless \ 0}} \right. \; \; \; ili\; \; \; \; -27 \leq x \leq 3\\\\ \left \{ {{x\in [\, 3,+\infty )} \atop {x\in (-2,9)}} \right. \; \; \; ili\; \; \; x\in [-27,3\, ][/latex] [latex]x\in [\, 3,9)\; \; \; \; \; ili\; \; \; \; \; x\in [-27,3\, ]\\\\x\in [-27,9)[/latex]