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