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