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Simplifying 7k + 9 = 4k + 3k + 9 Reorder the terms: 9 + 7k = 4k + 3k + 9 Reorder the terms: 9 + 7k = 9 + 4k + 3k Combine like terms: 4k + 3k = 7k 9 + 7k = 9 + 7k Add '-9' to each side of the equation. 9 + -9 + 7k = 9 + -9 + 7k Combine like terms: 9 + -9 = 0 0 + 7k = 9 + -9 + 7k 7k = 9 + -9 + 7k Combine like terms: 9 + -9 = 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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