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Simplifying 4x + 138 = 2x + 156 Reorder the terms: 138 + 4x = 2x + 156 Reorder the terms: 138 + 4x = 156 + 2x Solving 138 + 4x = 156 + 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. 138 + 4x + -2x = 156 + 2x + -2x Combine like terms: 4x + -2x = 2x 138 + 2x = 156 + 2x + -2x Combine like terms: 2x + -2x = 0 138 + 2x = 156 + 0 138 + 2x = 156 Add '-138' to each side of the equation. 138 + -138 + 2x = 156 + -138 Combine like terms: 138 + -138 = 0 0 + 2x = 156 + -138 2x = 156 + -138 Combine like terms: 156 + -138 = 18 2x = 18 Divide each side by '2'. x = 9 Simplifying x = 9
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