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2x-3y=12
-2x+2y= -16
2x-3y=12
----------------
2y-3y= -16+12
-y= -4/*(-1)
y=4
x-y=8
x-4=8
x=8+4
x=12
te liczby to 12 i 4
Metoda podstawiania
x-y=8
2x-3y=12
x= 8+y
2(8+y) -3y=12
x=8+y
16+2y-3y=12
x=8+y
-y=-4 |*(-1)
x=8+y
y=4
x=8+4
y=4
x=12
y=4