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Simplifying 6(7x + 9) = 390 Reorder the terms: 6(9 + 7x) = 390 (9 * 6 + 7x * 6) = 390 (54 + 42x) = 390 Solving 54 + 42x = 390 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-54' to each side of the equation. 54 + -54 + 42x = 390 + -54 Combine like terms: 54 + -54 = 0 0 + 42x = 390 + -54 42x = 390 + -54 Combine like terms: 390 + -54 = 336 42x = 336 Divide each side by '42'. x = 8 Simplifying x = 8
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