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Simplifying 3x2 + 12x = 3(x2 + 4x) Reorder the terms: 12x + 3x2 = 3(x2 + 4x) Reorder the terms: 12x + 3x2 = 3(4x + x2) 12x + 3x2 = (4x * 3 + x2 * 3) 12x + 3x2 = (12x + 3x2) Add '-12x' to each side of the equation. 12x + -12x + 3x2 = 12x + -12x + 3x2 Combine like terms: 12x + -12x = 0 0 + 3x2 = 12x + -12x + 3x2 3x2 = 12x + -12x + 3x2 Combine like terms: 12x + -12x = 0 3x2 = 0 + 3x2 3x2 = 3x2 Add '-3x2' to each side of the equation. 3x2 + -3x2 = 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 0 0 = 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 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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