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Simplifying 31 = 2x + 2(2x + -1) Reorder the terms: 31 = 2x + 2(-1 + 2x) 31 = 2x + (-1 * 2 + 2x * 2) 31 = 2x + (-2 + 4x) Reorder the terms: 31 = -2 + 2x + 4x Combine like terms: 2x + 4x = 6x 31 = -2 + 6x Solving 31 = -2 + 6x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6x' to each side of the equation. 31 + -6x = -2 + 6x + -6x Combine like terms: 6x + -6x = 0 31 + -6x = -2 + 0 31 + -6x = -2 Add '-31' to each side of the equation. 31 + -31 + -6x = -2 + -31 Combine like terms: 31 + -31 = 0 0 + -6x = -2 + -31 -6x = -2 + -31 Combine like terms: -2 + -31 = -33 -6x = -33 Divide each side by '-6'. x = 5.5 Simplifying x = 5.5
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