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Simplifying (-1) + x = 7 -1 + x = 7 Solving -1 + x = 7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 7 + 1 Combine like terms: -1 + 1 = 0 0 + x = 7 + 1 x = 7 + 1 Combine like terms: 7 + 1 = 8 x = 8 Simplifying x = 8

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