Równanie 1:
[tex]2(x+3)=x-9\\2x+6 = x-9 \ \ \ \ \ \ \ \ \ \ / -x\\x+6 = -9 \ \ \ \ \ \ \ \ \ \ \ \ \ /-6\\x = -15[/tex]
Równanie 2:
[tex]x-26= (2x-18)-(8+x)\\x-26 = (2x-18)-8-x\\x-26 = 2x-18-8-x\\x-26 = x-26 \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ /+26\\x=x \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ /-x\\0=0[/tex]