A.
\left \{{{1,5-(x-y)=0,5 (y-x)+2 \ |-1,5} \atop {2y-4=4x \ |: 2}} \right.
\left \{{{-x+y=0,5y-0,5x+0,5 \ |*2} \atop {y-2=2x}} \right.
\left \{{{-2x+2y=y-x+1} \atop {y=2x+2}} \right.
\left \{{{-2x+2y-y+x=1} \atop {y=2x+2}} \right.
\left \{{{y-x=1} \atop {y=2x+2}} \right.
podstawiam y do I równania
2x+2-x=1\\\\ x=1-2\\\\ x=-1
y=2x+2\\\\ y=2\cdot (-1)+2\\\\ y=-2+2\\\\ y=0
\left \{{{x=-1} \atop {y=0}} \right.
B.
\left \{{{-2x+3y=8} \atop { 26x-39y=104 \ |:(-13)}} \right.
\left \{{{-2x+3y=8} \atop {-2x+3y=-8}} \right.
Uklad równań sprzeczny.
Brak rozwiązań.