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Simplifying 7(k + -4) = 7k + -28 Reorder the terms: 7(-4 + k) = 7k + -28 (-4 * 7 + k * 7) = 7k + -28 (-28 + 7k) = 7k + -28 Reorder the terms: -28 + 7k = -28 + 7k Add '28' to each side of the equation. -28 + 28 + 7k = -28 + 28 + 7k Combine like terms: -28 + 28 = 0 0 + 7k = -28 + 28 + 7k 7k = -28 + 28 + 7k Combine like terms: -28 + 28 = 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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