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taisasnitko

Ответ:

Объяснение:{3x+5y=10,3x-7y=4;  из ур-ия (1) вычтем ур-ие (2) имеем:

{3x+5y=10, 12y=6;

{3x+5y=10,y=1/2;

{3x+5·1/2=10,y=1/2;

{3x=7,5 y=0,5;

{x=2,5 ,y=0,5.     ответ:(2,5;0,5)

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