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układ rownań 2x+3y=8 3x-y=1​

Odpowiedź :

Odpowiedź:

2x+3y=8

3x-y=1

2x+3y=8

-y=-3x+1 |·(-1)

2x+3y=8

y=3x-1

2x+3(3x-1)=8

y=3x-1

2x+9x-3=8

y=3x-1

11x=11 |:11

y=3x-1

x=1

y=3x-1

x=1

y=(3·1)-1

x=1

y=3-1

x=1

y=2

2x + 3y = 8

3x - y = 1 / *3

2x + 3y = 8

9x - 3y = 3

+ ----------------

11x = 11 /:11

x = 1

2x + 3y = 8

x = 1

2*1 + 3y = 8

x = 1

2 + 3y = 8

x = 1

3y = 8 - 2

x = 1

3y = 6 /:3

x = 1

y = 2