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Simplifying -1(x + 7) + 9 = 6x + 2 + -7x Reorder the terms: -1(7 + x) + 9 = 6x + 2 + -7x (7 * -1 + x * -1) + 9 = 6x + 2 + -7x (-7 + -1x) + 9 = 6x + 2 + -7x Reorder the terms: -7 + 9 + -1x = 6x + 2 + -7x Combine like terms: -7 + 9 = 2 2 + -1x = 6x + 2 + -7x Reorder the terms: 2 + -1x = 2 + 6x + -7x Combine like terms: 6x + -7x = -1x 2 + -1x = 2 + -1x Add '-2' to each side of the equation. 2 + -2 + -1x = 2 + -2 + -1x Combine like terms: 2 + -2 = 0 0 + -1x = 2 + -2 + -1x -1x = 2 + -2 + -1x Combine like terms: 2 + -2 = 0 -1x = 0 + -1x -1x = -1x Add 'x' to each side of the equation. -1x + x = -1x + x Combine like terms: -1x + x = 0 0 = -1x + x Combine like terms: -1x + x = 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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