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Simplifying n + 18 = 7(n + -21) Reorder the terms: 18 + n = 7(n + -21) Reorder the terms: 18 + n = 7(-21 + n) 18 + n = (-21 * 7 + n * 7) 18 + n = (-147 + 7n) Solving 18 + n = -147 + 7n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7n' to each side of the equation. 18 + n + -7n = -147 + 7n + -7n Combine like terms: n + -7n = -6n 18 + -6n = -147 + 7n + -7n Combine like terms: 7n + -7n = 0 18 + -6n = -147 + 0 18 + -6n = -147 Add '-18' to each side of the equation. 18 + -18 + -6n = -147 + -18 Combine like terms: 18 + -18 = 0 0 + -6n = -147 + -18 -6n = -147 + -18 Combine like terms: -147 + -18 = -165 -6n = -165 Divide each side by '-6'. n = 27.5 Simplifying n = 27.5
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