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