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Simplifying (x + -1) + 31 = 4x Reorder the terms: (-1 + x) + 31 = 4x Remove parenthesis around (-1 + x) -1 + x + 31 = 4x Reorder the terms: -1 + 31 + x = 4x Combine like terms: -1 + 31 = 30 30 + x = 4x Solving 30 + x = 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 30 + x + -4x = 4x + -4x Combine like terms: x + -4x = -3x 30 + -3x = 4x + -4x Combine like terms: 4x + -4x = 0 30 + -3x = 0 Add '-30' to each side of the equation. 30 + -30 + -3x = 0 + -30 Combine like terms: 30 + -30 = 0 0 + -3x = 0 + -30 -3x = 0 + -30 Combine like terms: 0 + -30 = -30 -3x = -30 Divide each side by '-3'. x = 10 Simplifying x = 10
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