There are 4 more Muscovy ducks than Cayugas, and 3 more than twice as many Cayugas as Khaki Campbells. If there are 90 ducks total, how many Muscovies are there? Let's think step by step and output the final answer after "####".
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Let x represent the number of Khaki Campbell ducks.
Cayugas:3+2x
Muscovies:4+(3+2x)=7+2x
Total: x+3+2x+7+2x=90
5x+10=90
5x=80
x=<<16=16>>16
Muscovy: 7+2(16)=39
#### 39
There are 4 more Muscovy ducks than Cayugas, and 3 more than twice as many Cayugas as Khaki Campbells. If there are 90 ducks total, how many Muscovies are there?
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