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Simplifying -9x + 10 = -1(9x + -10) Reorder the terms: 10 + -9x = -1(9x + -10) Reorder the terms: 10 + -9x = -1(-10 + 9x) 10 + -9x = (-10 * -1 + 9x * -1) 10 + -9x = (10 + -9x) Add '-10' to each side of the equation. 10 + -10 + -9x = 10 + -10 + -9x Combine like terms: 10 + -10 = 0 0 + -9x = 10 + -10 + -9x -9x = 10 + -10 + -9x Combine like terms: 10 + -10 = 0 -9x = 0 + -9x -9x = -9x Add '9x' to each side of the equation. -9x + 9x = -9x + 9x Combine like terms: -9x + 9x = 0 0 = -9x + 9x Combine like terms: -9x + 9x = 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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