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Simplifying (an) + -3(an + -1) = n an + -3(an + -1) = n Reorder the terms: an + -3(-1 + an) = n an + (-1 * -3 + an * -3) = n an + (3 + -3an) = n Reorder the terms: 3 + an + -3an = n Combine like terms: an + -3an = -2an 3 + -2an = n Solving 3 + -2an = n Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -2an = -3 + n Combine like terms: 3 + -3 = 0 0 + -2an = -3 + n -2an = -3 + n Divide each side by '-2n'. a = 1.5n-1 + -0.5 Simplifying a = 1.5n-1 + -0.5 Reorder the terms: a = -0.5 + 1.5n-1
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