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Simplifying -4a * 2b + 7 + 10a * 2b = 0 Reorder the terms for easier multiplication: -4 * 2a * b + 7 + 10a * 2b = 0 Multiply -4 * 2 -8a * b + 7 + 10a * 2b = 0 Multiply a * b -8ab + 7 + 10a * 2b = 0 Reorder the terms for easier multiplication: -8ab + 7 + 10 * 2a * b = 0 Multiply 10 * 2 -8ab + 7 + 20a * b = 0 Multiply a * b -8ab + 7 + 20ab = 0 Reorder the terms: 7 + -8ab + 20ab = 0 Combine like terms: -8ab + 20ab = 12ab 7 + 12ab = 0 Solving 7 + 12ab = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 12ab = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 12ab = 0 + -7 12ab = 0 + -7 Combine like terms: 0 + -7 = -7 12ab = -7 Divide each side by '12b'. a = -0.5833333333b-1 Simplifying a = -0.5833333333b-1
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