Предмет: Алгебра, автор: Slim777

Решите систему уравнений способом алгебраического сложения. -4x+6y=1 и 3x-8y=-6.

Ответы

Автор ответа: Tanguero
0
умножим первое уравнение на 3, а второе на 4

итого

-12x+18y=3

12x - 32y = -24

сложим. иксы сократятся. получим -14y= -21 значит y = 1.5

найдем икс: теперь первое уравнение умножим  на 4, второе на 3

-16x+24y=4
9x-24y=-18

сложим. игреки сократятся. останется -7x= -14, x=2
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