7-4=a(1-2)+b(1+3)
-7-4=a(-1-2)+b(-1+3)
3=-a+4b
-11=-3a+2b
a=4b-3
-11=-12b+9+2b
b=2
a=5
Ответ: (5;2)
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7-4=a(1-2)+b(1+3)
-7-4=a(-1-2)+b(-1+3)
3=-a+4b
-11=-3a+2b
a=4b-3
-11=-12b+9+2b
b=2
a=5
Ответ: (5;2)