Help solve a problem: A farm has 920 head of ducks and rabbits,?



The author posted a question in Homework

Help solve a problem: A farm has 920 head of ducks and rabbits,? and got a better answer

Response from Дима[+++]
920 х 2= 1840 2120 - 1840= 280 260: 2= 140 rabbits 920 -140= 780 ducks?

Response from 0[+++]
920 х 2= 1840 2120 - 1840= 280 260: 2= 140 rabbits 920 -140= 780 ducks

Response from 0[++]
We solved something like this but I don't remember how.

Response from 0[+++++]
My son solved through a system-140 rabbits 780 ducks.

Response from 0[+++++]
X*2+ 920-x *4=2120. x is the number of ducks. if it's a system, I'm a ballerina.

 

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