Add 6 to both sides.
Add -18 and 6 to get -12.
=> The correct answer will be Option B - x = - 12
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Hope it helps.
╰☆☆RainbowSalt2222☆☆╮
x - 6 = -18
x = -18 + 6
x = -12 ← the end
Answer: B)
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