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Simplifying 15 + -1(x + -2) = 15 + -1x + 2 Reorder the terms: 15 + -1(-2 + x) = 15 + -1x + 2 15 + (-2 * -1 + x * -1) = 15 + -1x + 2 15 + (2 + -1x) = 15 + -1x + 2 Combine like terms: 15 + 2 = 17 17 + -1x = 15 + -1x + 2 Reorder the terms: 17 + -1x = 15 + 2 + -1x Combine like terms: 15 + 2 = 17 17 + -1x = 17 + -1x Add '-17' to each side of the equation. 17 + -17 + -1x = 17 + -17 + -1x Combine like terms: 17 + -17 = 0 0 + -1x = 17 + -17 + -1x -1x = 17 + -17 + -1x Combine like terms: 17 + -17 = 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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