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Simplifying 20 + -2n = -3(1 + -7n) 20 + -2n = (1 * -3 + -7n * -3) 20 + -2n = (-3 + 21n) Solving 20 + -2n = -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. 20 + -2n + -21n = -3 + 21n + -21n Combine like terms: -2n + -21n = -23n 20 + -23n = -3 + 21n + -21n Combine like terms: 21n + -21n = 0 20 + -23n = -3 + 0 20 + -23n = -3 Add '-20' to each side of the equation. 20 + -20 + -23n = -3 + -20 Combine like terms: 20 + -20 = 0 0 + -23n = -3 + -20 -23n = -3 + -20 Combine like terms: -3 + -20 = -23 -23n = -23 Divide each side by '-23'. n = 1 Simplifying n = 1
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