Question

( y ) = × + y + 9 = 0

Answer 1

y = x + y + 9 = 0

y - y = x + 9 = 0

x + 9 = 0

x = -9 ✓




y = x + y + 9


y = -9 + 9 + x


y = x


logo :


x = -9 também ✓


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bom dia !! ♣