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2 years ago

- 4x + y = 6 - 5x - y = 21 The solution is

Mathematics

1 answer:

77julia77 [94]2 years ago

4 0

Answer:

x = -3

y = -6

Step-by-step explanation:

$y = 6 + 4x \\ - 5x - (6 + 4x) = 21 \\ - 9x - 6 = 21 \\ - 9x = 27 \\ x = - 3 \\ y = 6 + (4 \times - 3) = - 6$

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