Question 328257
Convert to slope-intercept form, {{{y=mx+b}}}.
{{{2x+y=5}}}
1.{{{y=-2x+5}}}
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{{{-2x-y=1}}}
2.{{{y=-2x-1}}}
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Since the slopes are identical and the intercepts are different, the lines are parallel. 
There is no solution. 
The lines never meet.
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{{{drawing(300,300,-5,5,-5,5,grid(1),graph(300,300,-5,5,-5,5,5-2x,-2x-1))}}}