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Simplifying 2(2x + 8) + 4 = 4x + 20 Reorder the terms: 2(8 + 2x) + 4 = 4x + 20 (8 * 2 + 2x * 2) + 4 = 4x + 20 (16 + 4x) + 4 = 4x + 20 Reorder the terms: 16 + 4 + 4x = 4x + 20 Combine like terms: 16 + 4 = 20 20 + 4x = 4x + 20 Reorder the terms: 20 + 4x = 20 + 4x Add '-20' to each side of the equation. 20 + -20 + 4x = 20 + -20 + 4x Combine like terms: 20 + -20 = 0 0 + 4x = 20 + -20 + 4x 4x = 20 + -20 + 4x Combine like terms: 20 + -20 = 0 4x = 0 + 4x 4x = 4x Add '-4x' to each side of the equation. 4x + -4x = 4x + -4x Combine like terms: 4x + -4x = 0 0 = 4x + -4x Combine like terms: 4x + -4x = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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