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Simplifying 9a = b(a + 4) Reorder the terms: 9a = b(4 + a) 9a = (4 * b + a * b) Reorder the terms: 9a = (ab + 4b) 9a = (ab + 4b) Solving 9a = ab + 4b Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1ab' to each side of the equation. 9a + -1ab = ab + -1ab + 4b Combine like terms: ab + -1ab = 0 9a + -1ab = 0 + 4b 9a + -1ab = 4b Combine like terms: 4b + -4b = 0 9a + -1ab + -4b = 0 The solution to this equation could not be determined.
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