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Simplifying 2(6x + 5) + 2(3x + 3) + 5 = 18x + 21 Reorder the terms: 2(5 + 6x) + 2(3x + 3) + 5 = 18x + 21 (5 * 2 + 6x * 2) + 2(3x + 3) + 5 = 18x + 21 (10 + 12x) + 2(3x + 3) + 5 = 18x + 21 Reorder the terms: 10 + 12x + 2(3 + 3x) + 5 = 18x + 21 10 + 12x + (3 * 2 + 3x * 2) + 5 = 18x + 21 10 + 12x + (6 + 6x) + 5 = 18x + 21 Reorder the terms: 10 + 6 + 5 + 12x + 6x = 18x + 21 Combine like terms: 10 + 6 = 16 16 + 5 + 12x + 6x = 18x + 21 Combine like terms: 16 + 5 = 21 21 + 12x + 6x = 18x + 21 Combine like terms: 12x + 6x = 18x 21 + 18x = 18x + 21 Reorder the terms: 21 + 18x = 21 + 18x Add '-21' to each side of the equation. 21 + -21 + 18x = 21 + -21 + 18x Combine like terms: 21 + -21 = 0 0 + 18x = 21 + -21 + 18x 18x = 21 + -21 + 18x Combine like terms: 21 + -21 = 0 18x = 0 + 18x 18x = 18x Add '-18x' to each side of the equation. 18x + -18x = 18x + -18x Combine like terms: 18x + -18x = 0 0 = 18x + -18x Combine like terms: 18x + -18x = 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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