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Simplifying 2x + 7(3x + 4) = 166 Reorder the terms: 2x + 7(4 + 3x) = 166 2x + (4 * 7 + 3x * 7) = 166 2x + (28 + 21x) = 166 Reorder the terms: 28 + 2x + 21x = 166 Combine like terms: 2x + 21x = 23x 28 + 23x = 166 Solving 28 + 23x = 166 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + 23x = 166 + -28 Combine like terms: 28 + -28 = 0 0 + 23x = 166 + -28 23x = 166 + -28 Combine like terms: 166 + -28 = 138 23x = 138 Divide each side by '23'. x = 6 Simplifying x = 6
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