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Simplifying 4(4x + 3) = 20x + 9 + -4x + 3 Reorder the terms: 4(3 + 4x) = 20x + 9 + -4x + 3 (3 * 4 + 4x * 4) = 20x + 9 + -4x + 3 (12 + 16x) = 20x + 9 + -4x + 3 Reorder the terms: 12 + 16x = 9 + 3 + 20x + -4x Combine like terms: 9 + 3 = 12 12 + 16x = 12 + 20x + -4x Combine like terms: 20x + -4x = 16x 12 + 16x = 12 + 16x Add '-12' to each side of the equation. 12 + -12 + 16x = 12 + -12 + 16x Combine like terms: 12 + -12 = 0 0 + 16x = 12 + -12 + 16x 16x = 12 + -12 + 16x Combine like terms: 12 + -12 = 0 16x = 0 + 16x 16x = 16x Add '-16x' to each side of the equation. 16x + -16x = 16x + -16x Combine like terms: 16x + -16x = 0 0 = 16x + -16x Combine like terms: 16x + -16x = 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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