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Simplifying 13x + 39 = 4(2x + 9) + 5x + 3 Reorder the terms: 39 + 13x = 4(2x + 9) + 5x + 3 Reorder the terms: 39 + 13x = 4(9 + 2x) + 5x + 3 39 + 13x = (9 * 4 + 2x * 4) + 5x + 3 39 + 13x = (36 + 8x) + 5x + 3 Reorder the terms: 39 + 13x = 36 + 3 + 8x + 5x Combine like terms: 36 + 3 = 39 39 + 13x = 39 + 8x + 5x Combine like terms: 8x + 5x = 13x 39 + 13x = 39 + 13x Add '-39' to each side of the equation. 39 + -39 + 13x = 39 + -39 + 13x Combine like terms: 39 + -39 = 0 0 + 13x = 39 + -39 + 13x 13x = 39 + -39 + 13x Combine like terms: 39 + -39 = 0 13x = 0 + 13x 13x = 13x Add '-13x' to each side of the equation. 13x + -13x = 13x + -13x Combine like terms: 13x + -13x = 0 0 = 13x + -13x Combine like terms: 13x + -13x = 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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