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