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Simplifying X + (X + 0.1) = 420 Reorder the terms: X + (0.1 + X) = 420 Remove parenthesis around (0.1 + X) X + 0.1 + X = 420 Reorder the terms: 0.1 + X + X = 420 Combine like terms: X + X = 2X 0.1 + 2X = 420 Solving 0.1 + 2X = 420 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + 2X = 420 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + 2X = 420 + -0.1 2X = 420 + -0.1 Combine like terms: 420 + -0.1 = 419.9 2X = 419.9 Divide each side by '2'. X = 209.95 Simplifying X = 209.95
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