[tex]\it a)\ x+5=-11|_{-5} \Rightarrow x=-16\\ \\ 15+x=2|_{-15} \Rightarrow x=-13\\ \\ x+(-3)=+21 \Rightarrow x-3=21|_{+3} \Rightarrow x=24[/tex]
[tex]\it b)\ x-(+13)=-25 \Rightarrow x-13=-25|_{+13} \Rightarrow x=-12\\ \\ x-(-31)=-7 \Rightarrow x+31=-7|_{-31} \Rightarrow x=-38\\ \\ -14-x=+17|_{\cdot(-1)} \Rightarrow 14+x=-17|_{-14} \Rightarrow x=-31[/tex]
[tex]\it d)\ x:(-9)=+216|_{\cdot(-9)} \Rightarrow x=-1944\\ \\ x:(-15)=-10|_{\cdot(-15)} \Rightarrow x=150\\ \\ x:(+14)=-5|_{\cdot14} \Rightarrow x=-70[/tex]
[tex]\it e)\ 36:x=-4 \Rightarrow x=36:(-4) \Rightarrow x=-9\\ \\ -108:x=3 \Rightarrow x=-108:3 \Rightarrow x=-36\\ \\ +244:x=-4 \Rightarrow x=244:(-4) \Rightarrow x=-61[/tex]
