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x+1\4y = -1
-1\2x -1\4y = -1\2
x+1\4y = -1
1\2x = -1 1\2
1\2x = -3\2 /÷1\2
x= -3\2 *2\1
x = -3
Podstawiamy za obliczone x ;
x+1\4y = -1
-3 +1\4y =-1
1\4y =2 /* 2
y=8
Sprawdzamy;
a+1\4y = -1
-3+1\4 * 8 = -1
-3+2= -1
-1= -1