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Simplifying 2x + 20 + 4x + -2 = 99 Reorder the terms: 20 + -2 + 2x + 4x = 99 Combine like terms: 20 + -2 = 18 18 + 2x + 4x = 99 Combine like terms: 2x + 4x = 6x 18 + 6x = 99 Solving 18 + 6x = 99 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-18' to each side of the equation. 18 + -18 + 6x = 99 + -18 Combine like terms: 18 + -18 = 0 0 + 6x = 99 + -18 6x = 99 + -18 Combine like terms: 99 + -18 = 81 6x = 81 Divide each side by '6'. x = 13.5 Simplifying x = 13.5
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