number of children tickets

Question

At the city museum, child admission is $5.20 and adult admission is $8.50. On Sunday, three times as many adult tickets as child tickets were sold, for a total sales of $644.70. How many child tickets were sold that day?

Answer 1

c represents the number of childrens tickets

3c represents the number of adult tickets.

5.20c + 8.50(3c) = 644.70

Can you solve for c and answer?