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Simplifying 42 = (3x + 6) Reorder the terms: 42 = (6 + 3x) Remove parenthesis around (6 + 3x) 42 = 6 + 3x Solving 42 = 6 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 42 + -3x = 6 + 3x + -3x Combine like terms: 3x + -3x = 0 42 + -3x = 6 + 0 42 + -3x = 6 Add '-42' to each side of the equation. 42 + -42 + -3x = 6 + -42 Combine like terms: 42 + -42 = 0 0 + -3x = 6 + -42 -3x = 6 + -42 Combine like terms: 6 + -42 = -36 -3x = -36 Divide each side by '-3'. x = 12 Simplifying x = 12
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