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Simplifying 3(2x + 5) = 7x + 15 + -1x Reorder the terms: 3(5 + 2x) = 7x + 15 + -1x (5 * 3 + 2x * 3) = 7x + 15 + -1x (15 + 6x) = 7x + 15 + -1x Reorder the terms: 15 + 6x = 15 + 7x + -1x Combine like terms: 7x + -1x = 6x 15 + 6x = 15 + 6x Add '-15' to each side of the equation. 15 + -15 + 6x = 15 + -15 + 6x Combine like terms: 15 + -15 = 0 0 + 6x = 15 + -15 + 6x 6x = 15 + -15 + 6x Combine like terms: 15 + -15 = 0 6x = 0 + 6x 6x = 6x Add '-6x' to each side of the equation. 6x + -6x = 6x + -6x Combine like terms: 6x + -6x = 0 0 = 6x + -6x Combine like terms: 6x + -6x = 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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