x = 5,75
y = 6,5
Пошаговое объяснение:
(1) * 2 (=) 12x - 10y = 4
(2) * (-5) (=) -20x + 10y = -50
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(2) + (1) (=) -20x + 10y + 12x - 10y = -50 + 4 (=)
(=) -8x = -46 (=) 8x = 46 (=)
