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Simplifying 3k + -1(k + -4) + 3 = 7 + 2k Reorder the terms: 3k + -1(-4 + k) + 3 = 7 + 2k 3k + (-4 * -1 + k * -1) + 3 = 7 + 2k 3k + (4 + -1k) + 3 = 7 + 2k Reorder the terms: 4 + 3 + 3k + -1k = 7 + 2k Combine like terms: 4 + 3 = 7 7 + 3k + -1k = 7 + 2k Combine like terms: 3k + -1k = 2k 7 + 2k = 7 + 2k Add '-7' to each side of the equation. 7 + -7 + 2k = 7 + -7 + 2k Combine like terms: 7 + -7 = 0 0 + 2k = 7 + -7 + 2k 2k = 7 + -7 + 2k Combine like terms: 7 + -7 = 0 2k = 0 + 2k 2k = 2k Add '-2k' to each side of the equation. 2k + -2k = 2k + -2k Combine like terms: 2k + -2k = 0 0 = 2k + -2k Combine like terms: 2k + -2k = 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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