Answer: 9(3 + 2r)
Explanation:
27 18r
∧ ∧
3 9 2 9r
3 3 3 3r
27: 3 * 3 * 3
18r: 2 * 3 * 3 * r
Common Factors are 3 * 3 = 9
27: 9 * 3
18: 9 * 2r
27 + 18r = 9(3 + 2r)
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