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Simplifying 1mn + -7n + 3m + -21 = 0 Reorder the terms: -21 + 3m + 1mn + -7n = 0 Solving -21 + 3m + 1mn + -7n = 0 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 3m + 1mn + 21 + -7n = 0 + 21 Reorder the terms: -21 + 21 + 3m + 1mn + -7n = 0 + 21 Combine like terms: -21 + 21 = 0 0 + 3m + 1mn + -7n = 0 + 21 3m + 1mn + -7n = 0 + 21 Combine like terms: 0 + 21 = 21 3m + 1mn + -7n = 21 Add '7n' to each side of the equation. 3m + 1mn + -7n + 7n = 21 + 7n Combine like terms: -7n + 7n = 0 3m + 1mn + 0 = 21 + 7n 3m + 1mn = 21 + 7n Reorder the terms: -21 + 3m + 1mn + -7n = 21 + 7n + -21 + -7n Reorder the terms: -21 + 3m + 1mn + -7n = 21 + -21 + 7n + -7n Combine like terms: 21 + -21 = 0 -21 + 3m + 1mn + -7n = 0 + 7n + -7n -21 + 3m + 1mn + -7n = 7n + -7n Combine like terms: 7n + -7n = 0 -21 + 3m + 1mn + -7n = 0 The solution to this equation could not be determined.
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