2x-12=0=>2x=12=>x=6
-x+5=0=>-x=-5=>x=5
-13x-26=0=>-13x=26=>x=-2
2,1y-6.3=0=>2,1y=6,3=>y=3
-6y-18=0=>-6y=18=>y=-3
-10x+1=0=>-10x=-1=>10x=1=>[tex]x=\frac{1}{10}[/tex]
11y-4y=6-(-15),y€Z =>7y=21=>y=3
x+2x+3x=-42,x€N =>6x=42=>x=7
-4x+28=0=>-4x=-28=>x=7
2(x+3)-5=x-7=>2x+6-5=x-7=>2x+1=x-7=>x=-8
4(x+8)=3(x-2)=>4x+32=3x-6=>x=-6-32=-38
5x-3(x-1)=4-x=>5x-3x+3=4-x=>2x+3=4-x=>3x=1=>[tex]x=\frac{1}{3}[/tex]
Bafta!