1425.
1) {x-y-2=0
{2x-3y+1=0
x=y+2
2(y+2)-3y+1=0
2y+4-3y+1=0
-y=-5
y=5
x=7
2) {-x+y-4=0
{4x+y+1=0
y=x+4
4x+x+4+1=0
5x=-5
x=-1
y=3
1426.
1) {4x+3y-5=0
{x-y-3=0
x=y+3
4(y+3)+3y-5=0
4y+12+3y-5=0
7y=-7
y=-1
x=2
