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x+y x
----- - ---- = 4 /*6
2 3
x-y y
---- + ---- = - 3 /*6
2 3
3(x+y)-2x=24
3(x-y)+2y=-18
3x+3y-2x=24
3x-3y+2y=-18
x+3y=24
3x-y=-18
x=24-3y
3(24-3y)-y=-18
x=24-3y
72-9y-y=-18
x=24-3y
-10y=-18-72
x=24-3y
-10y=-90/ (-10)
x=24-3y
y=9
x=24-27
y=9
x=-3
y=9
Pozdrawiam;)