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Simplifying 6 = 21 + -1(-13n) Remove parenthesis around (-13n) 6 = 21 + -1 * -13n Multiply -1 * -13 6 = 21 + 13n Solving 6 = 21 + 13n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-13n' to each side of the equation. 6 + -13n = 21 + 13n + -13n Combine like terms: 13n + -13n = 0 6 + -13n = 21 + 0 6 + -13n = 21 Add '-6' to each side of the equation. 6 + -6 + -13n = 21 + -6 Combine like terms: 6 + -6 = 0 0 + -13n = 21 + -6 -13n = 21 + -6 Combine like terms: 21 + -6 = 15 -13n = 15 Divide each side by '-13'. n = -1.153846154 Simplifying n = -1.153846154
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