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Simplifying 5(4x + 7) + -7 = 20x + 28 Reorder the terms: 5(7 + 4x) + -7 = 20x + 28 (7 * 5 + 4x * 5) + -7 = 20x + 28 (35 + 20x) + -7 = 20x + 28 Reorder the terms: 35 + -7 + 20x = 20x + 28 Combine like terms: 35 + -7 = 28 28 + 20x = 20x + 28 Reorder the terms: 28 + 20x = 28 + 20x Add '-28' to each side of the equation. 28 + -28 + 20x = 28 + -28 + 20x Combine like terms: 28 + -28 = 0 0 + 20x = 28 + -28 + 20x 20x = 28 + -28 + 20x Combine like terms: 28 + -28 = 0 20x = 0 + 20x 20x = 20x Add '-20x' to each side of the equation. 20x + -20x = 20x + -20x Combine like terms: 20x + -20x = 0 0 = 20x + -20x Combine like terms: 20x + -20x = 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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