January 2019 1 42 Report
Proszę o rozwiązanie i wytłumaczenie mi tego zadania :
(układy równań)

1) x - y = 6x + 1
2x - 5 = y + 1

2) 3x - 2 (x-y) =4x + 1
(x - 1) (x + 2) = x^2 -y - 1


3) (x - 1) ^2 + (y + 2)^2 = x^2 + y^2 - 3
3(x + 2) - 6y = 0


4) 5x - 2y = 7
3y - 2x = 4


5) 4 (x - 5) - 2 (1 - y) =x + y
2 (x - 2) - 3 (x - y) = 2
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