What is the value for x when solving the equation –x + (–1) = 3x + (–5) using algebra tiles?

Combine the negative tiles on the left and the positive and negative tiles on the right: −x − 1 = 3x − 5. Add x to both sides, then add 5 to both sides, giving 4 = 4x, so divide by 4 to get x = 1. The correct choice is B, x = 1.

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