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Simplifying a(3b) + b(-3a) = 0 Remove parenthesis around (3b) a * 3b + b(-3a) = 0 Reorder the terms for easier multiplication: 3a * b + b(-3a) = 0 Multiply a * b 3ab + b(-3a) = 0 Remove parenthesis around (-3a) 3ab + b * -3a = 0 Reorder the terms for easier multiplication: 3ab + -3b * a = 0 Multiply b * a 3ab + -3ab = 0 Combine like terms: 3ab + -3ab = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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