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Simplifying -81 + -7x = 58 + -21x Solving -81 + -7x = 58 + -21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21x' to each side of the equation. -81 + -7x + 21x = 58 + -21x + 21x Combine like terms: -7x + 21x = 14x -81 + 14x = 58 + -21x + 21x Combine like terms: -21x + 21x = 0 -81 + 14x = 58 + 0 -81 + 14x = 58 Add '81' to each side of the equation. -81 + 81 + 14x = 58 + 81 Combine like terms: -81 + 81 = 0 0 + 14x = 58 + 81 14x = 58 + 81 Combine like terms: 58 + 81 = 139 14x = 139 Divide each side by '14'. x = 9.928571429 Simplifying x = 9.928571429
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