#−[4+2(x+1)]=3(x+1)+3#
Left side:
#−[4 color(red)(+2(x+1) ]]=3(x+1)+3#
#−[4color(blue)(+2x+2)]=3(x+1)+3#
#−[color(red)4+2xcolor(red)(+2)]=3(x+1)+3#
#−[2x color(blue)(+6)]=3(x+1)+3#
#color(red)(−1[2x +6])=3(x+1)+3#
#color(blue)(−2x -6)=3(x+1)+3#
Right side:
#−2x -6=3(x+1)+3#
#−2x -6=color(red)(3(x+1))+3#
#−2x -6=color(blue)(3x+3)+3#
#-2x -6=3xcolor(red)(+3+3)#
#-2x -6=3xcolor(blue)(+6)#
Both Sides:
#-2x(color(red)(-6-6))=3xcancel(color(red)(+6-6))#
#-2xcolor(blue)(-12)=3x#
#cancelcolor(red)(-2x+2x)-12=color(red)(3x+2x)#
#-12=color(blue)(5x)#
#color(red)(-12/5)=cancelcolor(red)(5/5)x#
#color(blue)(-12/5)=color(blue)x#
#-12/5=x#
I hope this helps