1) 6x + 12 / 6x = 6 * (x + 2) / 6x = x+2 / x
2) (4a - 2ab) / 12ab = 2a * (2-b) / 2a * 6b = 2-b / 6b
3) (7x - 21y) / (5x - 15y) = (7* (x - 3y)) / 5 * (x - 3y) = 7/5
4) 4* (a-6)² / (a-6)³ = 4* (a-6)² / (a-6)*(a-6)² = 4 / (a-6)
2) (4a - 2ab) / 12ab = 2a * (2-b) / 2a * 6b = 2-b / 6b
3) (7x - 21y) / (5x - 15y) = (7* (x - 3y)) / 5 * (x - 3y) = 7/5
4) 4* (a-6)² / (a-6)³ = 4* (a-6)² / (a-6)*(a-6)² = 4 / (a-6)
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