Question

repede va rog !!!!!!!!!!!!!!!!!!!!!
$4x - y = 13 \\ 5x - 3y = 4$
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Answer 1

Răspuns:

Explicație pas cu pas:

{4x-y = 13  I·3 =>

{5x-3y = 4

----

{12x-3y = 39

{5x-3y = 4

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12x-5x = 39-4 =>

7x = 35 => x = 35:7 => x = 5

y = 4x-13 => y = 4·5-13 = 20-13 => y = 7