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Simplifying 6x + 6(x + 11) = 138 Reorder the terms: 6x + 6(11 + x) = 138 6x + (11 * 6 + x * 6) = 138 6x + (66 + 6x) = 138 Reorder the terms: 66 + 6x + 6x = 138 Combine like terms: 6x + 6x = 12x 66 + 12x = 138 Solving 66 + 12x = 138 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-66' to each side of the equation. 66 + -66 + 12x = 138 + -66 Combine like terms: 66 + -66 = 0 0 + 12x = 138 + -66 12x = 138 + -66 Combine like terms: 138 + -66 = 72 12x = 72 Divide each side by '12'. x = 6 Simplifying x = 6
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