Odpowiedzi

2013-07-04T12:38:14+02:00

x - 3(y - 3x) = 3x - 4

2(2x - y) = 4  /:2

 

x - 3y + 9x = 3x - 4

2x - y = 2

 

10x - 3x - 3y = -4

2x - y = 2

 

7x - 3y = -4

y = 2x - 2

 

7x - 3(2x - 2) = -4

7x - 6x + 6 = -4

x = -4 -6

x = -10

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y = 2*(-10) -2

y = -22

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{x = -10}

{y = -22}