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Simplifying 20x + 138 = 23 + -3x Reorder the terms: 138 + 20x = 23 + -3x Solving 138 + 20x = 23 + -3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3x' to each side of the equation. 138 + 20x + 3x = 23 + -3x + 3x Combine like terms: 20x + 3x = 23x 138 + 23x = 23 + -3x + 3x Combine like terms: -3x + 3x = 0 138 + 23x = 23 + 0 138 + 23x = 23 Add '-138' to each side of the equation. 138 + -138 + 23x = 23 + -138 Combine like terms: 138 + -138 = 0 0 + 23x = 23 + -138 23x = 23 + -138 Combine like terms: 23 + -138 = -115 23x = -115 Divide each side by '23'. x = -5 Simplifying x = -5
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