Question 876052
This one is easy
{{{system(4x+3y-2z=5,y=x+4z-5,z=-2x+2)}}}-->{{{system(4x+3y-2z=5,y=x+4(-2x+2)-5,z=-2x+2)}}}-->{{{system(4x+3y-2z=5,y=x-8x+8-5,z=-2x+2)}}}-->{{{system(4x+3y-2z=5,y=-7x+3,z=-2x+2)}}}-->{{{system(4x+3(-7x+3)-2(-2x+2)=5,y=-7x+3,z=-2x+2)}}}-->{{{system(4x-21x+9+4x-4=5,y=-7x+3,z=-2x+2)}}}-->{{{system(-13x+5=5,y=-7x+3,z=-2x+2)}}}-->{{{system(-13x=0,y=-7x+3,z=-2x+2)}}}-->{{{system(x=0,y=-7*0+3,z=-2*0+2)}}}-->{{{highlight(system(x=0,y=3,z=2))}}}