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Simplifying 6x + 3(7x + -9) = 189 Reorder the terms: 6x + 3(-9 + 7x) = 189 6x + (-9 * 3 + 7x * 3) = 189 6x + (-27 + 21x) = 189 Reorder the terms: -27 + 6x + 21x = 189 Combine like terms: 6x + 21x = 27x -27 + 27x = 189 Solving -27 + 27x = 189 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '27' to each side of the equation. -27 + 27 + 27x = 189 + 27 Combine like terms: -27 + 27 = 0 0 + 27x = 189 + 27 27x = 189 + 27 Combine like terms: 189 + 27 = 216 27x = 216 Divide each side by '27'. x = 8 Simplifying x = 8
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