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Simplifying -7 + 15n = -7 + 10n + 5n Combine like terms: 10n + 5n = 15n -7 + 15n = -7 + 15n Add '7' to each side of the equation. -7 + 7 + 15n = -7 + 7 + 15n Combine like terms: -7 + 7 = 0 0 + 15n = -7 + 7 + 15n 15n = -7 + 7 + 15n Combine like terms: -7 + 7 = 0 15n = 0 + 15n 15n = 15n Add '-15n' to each side of the equation. 15n + -15n = 15n + -15n Combine like terms: 15n + -15n = 0 0 = 15n + -15n Combine like terms: 15n + -15n = 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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