Aloha :)
$$2x-21<\frac{-3x+37}{4}\quad\bigg|\cdot4$$$$8x-84<-3x+37\quad\big|+3x$$$$11x-84<37\quad\big|+84$$$$11x<121\quad\big|\div11$$$$x<11$$$$\mathbb L=\{x\in\mathbb R\,\big|\,x<11\}=(-\infty;11)$$
$$\frac{x+3}{-2}>\frac{13-x}{3}-x\quad\bigg|\cdot6$$$$-3\cdot(x+3)>2\cdot(13-x)-6\cdot x\quad\bigg|\text{Klammern ausrechnen}$$$$-3x-9>26-2x-6x\quad\big|\text{rechts zusammenfassen}$$$$-3x-9>26-8x\quad\big|+8x$$$$5x-9>26\quad\big|+9$$$$5x>35\quad\big|\div5$$$$x>7$$$$\mathbb L=\{x\in\mathbb R\,\big|\,x>7\}=(7;\infty)$$