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Simplifying 7x + 2(3x + 11) = 139 Reorder the terms: 7x + 2(11 + 3x) = 139 7x + (11 * 2 + 3x * 2) = 139 7x + (22 + 6x) = 139 Reorder the terms: 22 + 7x + 6x = 139 Combine like terms: 7x + 6x = 13x 22 + 13x = 139 Solving 22 + 13x = 139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-22' to each side of the equation. 22 + -22 + 13x = 139 + -22 Combine like terms: 22 + -22 = 0 0 + 13x = 139 + -22 13x = 139 + -22 Combine like terms: 139 + -22 = 117 13x = 117 Divide each side by '13'. x = 9 Simplifying x = 9
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