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Simplifying 7(m + -7) = 91 Reorder the terms: 7(-7 + m) = 91 (-7 * 7 + m * 7) = 91 (-49 + 7m) = 91 Solving -49 + 7m = 91 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '49' to each side of the equation. -49 + 49 + 7m = 91 + 49 Combine like terms: -49 + 49 = 0 0 + 7m = 91 + 49 7m = 91 + 49 Combine like terms: 91 + 49 = 140 7m = 140 Divide each side by '7'. m = 20 Simplifying m = 20
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