\left \{ {{5x+2y-3x+y=3y} \atop {4x-5y+x+4y=2}} \right.
\left \{ {{2x+3y=3y} \atop {5x-y=2}} \right.
\left \{ {{2x+3y-3y=0} \atop {5x-y=2}} \right.
\left \{ {{2x=0} \atop {5x-y=2}} \right.
\left \{ {{x=0} \atop {5*0-y=2}} \right.
\left \{ {{x=0} \atop {-y=2}} \right.
\left \{ {{x=0} \atop {y=-2}} \right.
…
\left \{ {{x+1-2x+3-y=2y+4} \atop {4y+x-2=4(y-0,5)}} \right.
\left \{ {{-x+4-y=2y+4} \atop {4y+x-2=4y-2}} \right.
\left \{ {{-x=2y+4-y-4} \atop {4y+x-2=4y-2}} \right.
\left \{ {{-x=y} \atop {x-2=4y-2-4y}} \right.
\left \{ {{x=-y} \atop {x-2=-2}} \right.
\left \{ {{x=-y} \atop {x=-2+2}} \right.
\left \{ {{x=-y} \atop {x=0}} \right.
\left \{ {{x=0} \atop {x=0}} \right.