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{2x-y=0
+_______
5x = 5/:5
{x=1
{2*1-y=0
{x=1
{-y = -2/:(-1)
{x=1
{y = 2
+
{2x-y=0
5x =5 /5
x=1
{x=1
{3x+y=5
{x=1
{(3*1) +y=5
{x=1
{y=5-3
{x=1
{y=2