Question

punctul a va rog imi trebuie urgent
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Answer 1

Răspuns:

x = -2 ; y = -3

Explicație pas cu pas:

{³⁾(3x-4y+10)/4 - ²⁾(x-4y+8)/6 = ¹²⁾1

{²⁾(5x-2y-8)/3 - ³⁾(3x+4y+6)/2 = ⁶⁾2 <=>

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{9x-12y+30-2x+8y-16 = 12

{10x-4y-16-9x-12y-18 = 12 <=>

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{7x-4y = 12-14 = -2   I·4

{x-16y = 12+34 = 46 =>

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{28x-16y = -8

{x-16y = 46

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28x-x = -8-46 = -54 =>

27x = -54 => x = -54/27 => x = -2

7·(-2)-4y = -2 => 4y = -14+2 = -12 =>

y = -12/4 => y = -3