maths
posted by preeti .
bus tickets cost $3 for an adult and $2 for a child. there are 'a' adults nd 'c' children on a bus. the total number of people on the bus is 52. the total cost of the 52 tickets is $139. find the number of children on the bus.

maths 
Reiny
number of kids  x
number of adults  52x
solve for x .....
2x + 3(52x) = 139
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