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