Ответы на вопрос:
Объяснение:
{4y - 7x = -7
{4y + x = 2 | *(-1)
{4y - 7x = -7
{-4y - x = -2
{-7x = -7
{-x = -2
-7x + (-x) = -7 + (-2)
-7x - x = -7 - 2
-8x = -9 | : (-8)
x = 1,125
4y + x = 2
4y + 1,125 = 2
4у = 2 - 1,125
4y = 0,875 | :4
y = 0,21875
ответ: (1,125 ; 0,21875 )
x = 1,125
y = 0,21875
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