Respuesta :

Answer:

x = -21

Explanation:

Subtract 6 From Both Sides

x + 6 - 6 = -15 - 6

Simplify

x + 6 - 6 = x

-15 - 6 = -21

x = -21

Mordancy.
-21

X+6=-15

X=-15-6

X=-21

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