What is the value for x when using algebra tiles to solve the equation x + 1 = –x + (–5)?

Start with x + 1 = –x + (–5). Add x to both sides to combine the variable terms, giving 2x + 1 = –5. Subtract 1 from both sides, so 2x = –6; divide by 2 to get x = –3. The correct choice is D, x = –3.

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