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Simplifying (12x + 69) = (8x + 81) Reorder the terms: (69 + 12x) = (8x + 81) Remove parenthesis around (69 + 12x) 69 + 12x = (8x + 81) Reorder the terms: 69 + 12x = (81 + 8x) Remove parenthesis around (81 + 8x) 69 + 12x = 81 + 8x Solving 69 + 12x = 81 + 8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8x' to each side of the equation. 69 + 12x + -8x = 81 + 8x + -8x Combine like terms: 12x + -8x = 4x 69 + 4x = 81 + 8x + -8x Combine like terms: 8x + -8x = 0 69 + 4x = 81 + 0 69 + 4x = 81 Add '-69' to each side of the equation. 69 + -69 + 4x = 81 + -69 Combine like terms: 69 + -69 = 0 0 + 4x = 81 + -69 4x = 81 + -69 Combine like terms: 81 + -69 = 12 4x = 12 Divide each side by '4'. x = 3 Simplifying x = 3
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