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Simplifying 2x + 15 = 31 + -2x Reorder the terms: 15 + 2x = 31 + -2x Solving 15 + 2x = 31 + -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. 15 + 2x + 2x = 31 + -2x + 2x Combine like terms: 2x + 2x = 4x 15 + 4x = 31 + -2x + 2x Combine like terms: -2x + 2x = 0 15 + 4x = 31 + 0 15 + 4x = 31 Add '-15' to each side of the equation. 15 + -15 + 4x = 31 + -15 Combine like terms: 15 + -15 = 0 0 + 4x = 31 + -15 4x = 31 + -15 Combine like terms: 31 + -15 = 16 4x = 16 Divide each side by '4'. x = 4 Simplifying x = 4
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