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Simplifying -1k + -1(-8k + 7) = -1k + 8k + -7 Reorder the terms: -1k + -1(7 + -8k) = -1k + 8k + -7 -1k + (7 * -1 + -8k * -1) = -1k + 8k + -7 -1k + (-7 + 8k) = -1k + 8k + -7 Reorder the terms: -7 + -1k + 8k = -1k + 8k + -7 Combine like terms: -1k + 8k = 7k -7 + 7k = -1k + 8k + -7 Reorder the terms: -7 + 7k = -7 + -1k + 8k Combine like terms: -1k + 8k = 7k -7 + 7k = -7 + 7k Add '7' to each side of the equation. -7 + 7 + 7k = -7 + 7 + 7k Combine like terms: -7 + 7 = 0 0 + 7k = -7 + 7 + 7k 7k = -7 + 7 + 7k Combine like terms: -7 + 7 = 0 7k = 0 + 7k 7k = 7k Add '-7k' to each side of the equation. 7k + -7k = 7k + -7k Combine like terms: 7k + -7k = 0 0 = 7k + -7k Combine like terms: 7k + -7k = 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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