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Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Let 'x' be the number of dogs 'y' be the number of cows 'z' be the number of goats x + y = 9 -----equation 1 y + z = 10 -----equation 2 x + y + z = 16 ----equation 3 from equation 1 x + y = 9 x = 9 - y -----equation 1' from equation 2 y + z = 10 z = 10 - y ----equation 2' substitute equations 1' and 2' to equation 3 x + y + z =16 (9 - y) + y + (10 - y) = 16 9 - y + y + 10 - y = 16 -y = 16 - 9 -10 -y = -3 y = 3 cows substitute to equations 1' and 2' x = 9 - y x = 9 - 3 x = 6 dogs z = 10 - y z = 10 - 3 z = 7 goats