|1-x| =[tex] \left \{ {{x-1,x \geq 1} \atop {1-x,x\ \textless \ 1}} \right. [/tex]
|3x-6| = [tex] \left \{ {{3x-6,3x \geq 6} \atop {6-3x,3x\ \textless \ 6}} \right. [/tex]
|10-5x|= [tex] \left \{ {{5x-10,5x \geq 10} \atop {10-5x,5x\ \textless \ 10}} \right. [/tex]
