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Simplifying 7(2x + -9) + -18 = 15 Reorder the terms: 7(-9 + 2x) + -18 = 15 (-9 * 7 + 2x * 7) + -18 = 15 (-63 + 14x) + -18 = 15 Reorder the terms: -63 + -18 + 14x = 15 Combine like terms: -63 + -18 = -81 -81 + 14x = 15 Solving -81 + 14x = 15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '81' to each side of the equation. -81 + 81 + 14x = 15 + 81 Combine like terms: -81 + 81 = 0 0 + 14x = 15 + 81 14x = 15 + 81 Combine like terms: 15 + 81 = 96 14x = 96 Divide each side by '14'. x = 6.857142857 Simplifying x = 6.857142857
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