Answer:

12

Step-by-step explanation:

Let B be the bigger number

M for smaller number

B + M = 66

B = 66 – M

2B = 9M

2(66–M) = 9M

132 – 2M = 9M

132 = 9M + 2M

132 = 11M

132/11 = M

12 = M

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