Question

Rozwiaz rownania metoda przeciwnych wspolczynnikow

2x - 11y = 73

3x - 4 y = 47

9x + 8y = 1

5x - 6y = 11

Answer 1

a){2x - 11y = 73  / *(-3) 

{3x - 4y = 47  / *2

 

{-6x + 33y = - 219

+{6x - 8y = 94

 

25y = -125

y = -5

 

3x - 4*(-5) = 47

3x - 20 = 47

3x = 27

x = 9

 

{x = 9

{y = -5

 

b) {9x + 8y = 1 / *(-5)

{5x - 6y = 11 / * 9

 

{-35x - 40y = -5

+{35x - 54y = 99

-94y = -94

y = 1

 

5x - 6*1 = 11

5x - 6 = 11

5x = 5

x = 1

 

{x = 1

{y = 1

 

Myślę że pomogłem