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Simplifying (b + -1a) * y = by + -1ay Reorder the terms: (-1a + b) * y = by + -1ay Reorder the terms for easier multiplication: y(-1a + b) = by + -1ay (-1a * y + b * y) = by + -1ay (-1ay + by) = by + -1ay Reorder the terms: -1ay + by = -1ay + by Add 'ay' to each side of the equation. -1ay + ay + by = -1ay + ay + by Combine like terms: -1ay + ay = 0 0 + by = -1ay + ay + by by = -1ay + ay + by Combine like terms: -1ay + ay = 0 by = 0 + by by = by Add '-1by' to each side of the equation. by + -1by = by + -1by Combine like terms: by + -1by = 0 0 = by + -1by Combine like terms: by + -1by = 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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