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Simplifying 7x + 2(3 + x) = 12 7x + (3 * 2 + x * 2) = 12 7x + (6 + 2x) = 12 Reorder the terms: 6 + 7x + 2x = 12 Combine like terms: 7x + 2x = 9x 6 + 9x = 12 Solving 6 + 9x = 12 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 9x = 12 + -6 Combine like terms: 6 + -6 = 0 0 + 9x = 12 + -6 9x = 12 + -6 Combine like terms: 12 + -6 = 6 9x = 6 Divide each side by '9'. x = 0.6666666667 Simplifying x = 0.6666666667
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