Question

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Answer 1

1. (0;4) (3;0) (6;-4)

Answer 2

Ответ:

1-(0;4);(3;0);(6;-4)

2-(4х-у=19

(х+15у=20

(у=4х-19

(х+15(4х-19)=20

(у=4х-19

(61х-285=20

(у=4х-19

(61х=305

(у=4х-19

(х=5 1/12

(у=20 1/3 - 19

(х=5 1/12

(у=1 1/3

(х=5 1/12

3-не смог.