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Simplifying 63 = -7(-7 + -1n) 63 = (-7 * -7 + -1n * -7) 63 = (49 + 7n) Solving 63 = 49 + 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. 63 + -7n = 49 + 7n + -7n Combine like terms: 7n + -7n = 0 63 + -7n = 49 + 0 63 + -7n = 49 Add '-63' to each side of the equation. 63 + -63 + -7n = 49 + -63 Combine like terms: 63 + -63 = 0 0 + -7n = 49 + -63 -7n = 49 + -63 Combine like terms: 49 + -63 = -14 -7n = -14 Divide each side by '-7'. n = 2 Simplifying n = 2
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