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Simplifying -3a(a + b + -5) + 4(-2a + 2b) + b(a + 3b + -7) = 0 Reorder the terms: -3a(-5 + a + b) + 4(-2a + 2b) + b(a + 3b + -7) = 0 (-5 * -3a + a * -3a + b * -3a) + 4(-2a + 2b) + b(a + 3b + -7) = 0 Reorder the terms: (15a + -3ab + -3a2) + 4(-2a + 2b) + b(a + 3b + -7) = 0 (15a + -3ab + -3a2) + 4(-2a + 2b) + b(a + 3b + -7) = 0 15a + -3ab + -3a2 + (-2a * 4 + 2b * 4) + b(a + 3b + -7) = 0 15a + -3ab + -3a2 + (-8a + 8b) + b(a + 3b + -7) = 0 Reorder the terms: 15a + -3ab + -3a2 + -8a + 8b + b(-7 + a + 3b) = 0 15a + -3ab + -3a2 + -8a + 8b + (-7 * b + a * b + 3b * b) = 0 Reorder the terms: 15a + -3ab + -3a2 + -8a + 8b + (ab + -7b + 3b2) = 0 15a + -3ab + -3a2 + -8a + 8b + (ab + -7b + 3b2) = 0 Reorder the terms: 15a + -8a + -3ab + ab + -3a2 + 8b + -7b + 3b2 = 0 Combine like terms: 15a + -8a = 7a 7a + -3ab + ab + -3a2 + 8b + -7b + 3b2 = 0 Combine like terms: -3ab + ab = -2ab 7a + -2ab + -3a2 + 8b + -7b + 3b2 = 0 Combine like terms: 8b + -7b = 1b 7a + -2ab + -3a2 + 1b + 3b2 = 0 Solving 7a + -2ab + -3a2 + 1b + 3b2 = 0 Solving for variable 'a'. The solution to this equation could not be determined.
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