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=5 - 9 + 2 +2v2+1=
=2v2-1
2)
2x+3y=2
x+2y=7
2x+3y=2
x=7-2y
2(7-2y)+3y=2
x=7-2y
14-4y+3y=2
x=7-2y
-y=-12 /:(-1)
x=7-2y
y=12
x=7-2*12=7-24=-17
odp.
x=-17
y=12