6(x+1)+2(х-1)(х+х+1)-2(х+1)=26

(х+2)*-х(3х+1)*+(2х+1)(4х*-2х+1)=42

1) 6(x+1)+2(x-1)(x+x+1)-2(x+1)=266(x+1)+2(x+x+x-x-x -1)-2(x+1)=266x+6+2x+2x+2x-2x-2x-2-2x-2-26=06x-24=06x=24x=4x=2