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