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Simplifying -7(2x + -3) + 7 = -14x + 28 Reorder the terms: -7(-3 + 2x) + 7 = -14x + 28 (-3 * -7 + 2x * -7) + 7 = -14x + 28 (21 + -14x) + 7 = -14x + 28 Reorder the terms: 21 + 7 + -14x = -14x + 28 Combine like terms: 21 + 7 = 28 28 + -14x = -14x + 28 Reorder the terms: 28 + -14x = 28 + -14x Add '-28' to each side of the equation. 28 + -28 + -14x = 28 + -28 + -14x Combine like terms: 28 + -28 = 0 0 + -14x = 28 + -28 + -14x -14x = 28 + -28 + -14x Combine like terms: 28 + -28 = 0 -14x = 0 + -14x -14x = -14x Add '14x' to each side of the equation. -14x + 14x = -14x + 14x Combine like terms: -14x + 14x = 0 0 = -14x + 14x Combine like terms: -14x + 14x = 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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