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5x+2y=1
-6x-2y=0
5x+2y=1
-x=1 /÷(-1)
x= -1
Podstawiamy za obliczone x , aby obliczyć y;
5x+2y=1
5*(-1)+2y=1
-5+2y=1
2y=1+5
2y=6 /÷2
y=3
Sprawdzamy;
5x+2y=1
5*(-1)+2*3=1
-5+6=1
1=1
5x+2(-3x)=1
5x-6x=1
-x=1 :(-1)
x=-1
wtedy y=-3*(-1)=3
Odpowiedz x=-1 y=3