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Simplifying (2 + -9c)(-8) = -16 + 72c Reorder the terms for easier multiplication: -8(2 + -9c) = -16 + 72c (2 * -8 + -9c * -8) = -16 + 72c (-16 + 72c) = -16 + 72c Add '16' to each side of the equation. -16 + 16 + 72c = -16 + 16 + 72c Combine like terms: -16 + 16 = 0 0 + 72c = -16 + 16 + 72c 72c = -16 + 16 + 72c Combine like terms: -16 + 16 = 0 72c = 0 + 72c 72c = 72c Add '-72c' to each side of the equation. 72c + -72c = 72c + -72c Combine like terms: 72c + -72c = 0 0 = 72c + -72c Combine like terms: 72c + -72c = 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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