Answer:
x = - 3, y = ± 4
Step-by-step explanation:
Add corresponding elements and equate to corresponding element on right side, that is
x + 4 - 9x = 28
- 8x + 4 = 28 ( subtract 4 from both sides )
- 8x = 24 ( divide both sides by - 8 )
x = - 3
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y² + 1 - 17 = 0
y² - 16 = 0 ( add 16 to both sides )
y² = 16 ( take the square root of both sides )
y = ± [tex]\sqrt{16}[/tex] = ± 4
