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Simplifying 7x + -9 + 7x = 121 Reorder the terms: -9 + 7x + 7x = 121 Combine like terms: 7x + 7x = 14x -9 + 14x = 121 Solving -9 + 14x = 121 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 14x = 121 + 9 Combine like terms: -9 + 9 = 0 0 + 14x = 121 + 9 14x = 121 + 9 Combine like terms: 121 + 9 = 130 14x = 130 Divide each side by '14'. x = 9.285714286 Simplifying x = 9.285714286
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