200 tickets were sold the amount income was 475 dollars. The kids were $2 and adults were $3. How much tickets were sold to the adults

Question

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Answer 1

let k the number of tickets sold to kids and a the number of tickets sold to adults. then it will be;  k+a = 200 (1) and 2k + 3a = 475 (2)  from the (1) we get  k=200-a  plugging this value of k to (2) we get 

2(200-a)+3a = 475  --->>>  400-2a+3a=475  --->>>>  a=475-400  --->>>  a=75 so number of adults = 75

(and number of kids = 200-75=125)