Question

Решение через формулу Крамера.
3x-y=-4
x-3y=-4

Answer 1

3x – y = -4
x – 3y = -4 ;

у=3х+4
х-3(3х+4)=-4; х-9х-12=-4; -8х=-4+12; -8х=8; 8х=-8; х=-8/8; х=-1; у=3·(-1)+4=-3+4=1
Ответ: х=-1; у=1

Answer 2

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