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Simplifying 8.4 = 2x + (8.4 + -2x) Remove parenthesis around (8.4 + -2x) 8.4 = 2x + 8.4 + -2x Reorder the terms: 8.4 = 8.4 + 2x + -2x Combine like terms: 2x + -2x = 0 8.4 = 8.4 + 0 8.4 = 8.4 Add '-8.4' to each side of the equation. 8.4 + -8.4 = 8.4 + -8.4 Combine like terms: 8.4 + -8.4 = 0.0 0.0 = 8.4 + -8.4 Combine like terms: 8.4 + -8.4 = 0.0 0.0 = 0.0 Solving 0.0 = 0.0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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