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Simplifying -31 = x + x + -7 Reorder the terms: -31 = -7 + x + x Combine like terms: x + x = 2x -31 = -7 + 2x Solving -31 = -7 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. -31 + -2x = -7 + 2x + -2x Combine like terms: 2x + -2x = 0 -31 + -2x = -7 + 0 -31 + -2x = -7 Add '31' to each side of the equation. -31 + 31 + -2x = -7 + 31 Combine like terms: -31 + 31 = 0 0 + -2x = -7 + 31 -2x = -7 + 31 Combine like terms: -7 + 31 = 24 -2x = 24 Divide each side by '-2'. x = -12 Simplifying x = -12
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