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Simplifying 25 + -7n = -3(1 + -7n) 25 + -7n = (1 * -3 + -7n * -3) 25 + -7n = (-3 + 21n) Solving 25 + -7n = -3 + 21n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-21n' to each side of the equation. 25 + -7n + -21n = -3 + 21n + -21n Combine like terms: -7n + -21n = -28n 25 + -28n = -3 + 21n + -21n Combine like terms: 21n + -21n = 0 25 + -28n = -3 + 0 25 + -28n = -3 Add '-25' to each side of the equation. 25 + -25 + -28n = -3 + -25 Combine like terms: 25 + -25 = 0 0 + -28n = -3 + -25 -28n = -3 + -25 Combine like terms: -3 + -25 = -28 -28n = -28 Divide each side by '-28'. n = 1 Simplifying n = 1
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