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Simplifying 40 + -4k = 4(-1k + 8) + 8 Reorder the terms: 40 + -4k = 4(8 + -1k) + 8 40 + -4k = (8 * 4 + -1k * 4) + 8 40 + -4k = (32 + -4k) + 8 Reorder the terms: 40 + -4k = 32 + 8 + -4k Combine like terms: 32 + 8 = 40 40 + -4k = 40 + -4k Add '-40' to each side of the equation. 40 + -40 + -4k = 40 + -40 + -4k Combine like terms: 40 + -40 = 0 0 + -4k = 40 + -40 + -4k -4k = 40 + -40 + -4k Combine like terms: 40 + -40 = 0 -4k = 0 + -4k -4k = -4k Add '4k' to each side of the equation. -4k + 4k = -4k + 4k Combine like terms: -4k + 4k = 0 0 = -4k + 4k Combine like terms: -4k + 4k = 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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