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Simplifying -1ab + 28ab + -12ab + 13 = 0 Reorder the terms: 13 + -1ab + 28ab + -12ab = 0 Combine like terms: -1ab + 28ab = 27ab 13 + 27ab + -12ab = 0 Combine like terms: 27ab + -12ab = 15ab 13 + 15ab = 0 Solving 13 + 15ab = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + 15ab = 0 + -13 Combine like terms: 13 + -13 = 0 0 + 15ab = 0 + -13 15ab = 0 + -13 Combine like terms: 0 + -13 = -13 15ab = -13 Divide each side by '15b'. a = -0.8666666667b-1 Simplifying a = -0.8666666667b-1
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