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Simplifying 3(3x + 3) = 12x + 5 + -3x + 4 Reorder the terms: 3(3 + 3x) = 12x + 5 + -3x + 4 (3 * 3 + 3x * 3) = 12x + 5 + -3x + 4 (9 + 9x) = 12x + 5 + -3x + 4 Reorder the terms: 9 + 9x = 5 + 4 + 12x + -3x Combine like terms: 5 + 4 = 9 9 + 9x = 9 + 12x + -3x Combine like terms: 12x + -3x = 9x 9 + 9x = 9 + 9x Add '-9' to each side of the equation. 9 + -9 + 9x = 9 + -9 + 9x Combine like terms: 9 + -9 = 0 0 + 9x = 9 + -9 + 9x 9x = 9 + -9 + 9x Combine like terms: 9 + -9 = 0 9x = 0 + 9x 9x = 9x Add '-9x' to each side of the equation. 9x + -9x = 9x + -9x Combine like terms: 9x + -9x = 0 0 = 9x + -9x Combine like terms: 9x + -9x = 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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