After a PTA Fun Night at school, the Water Fountain game had many coins at the bottom. When the coins were counted, it was found that the number of dimes was
half the number of quarters, the number of nickels was 7 more than three times the
number of quarters, and there were 34 pennies. If the total in the foutain was $18.69.
how many of each coin were in the fountain.

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Me find the value of x each figure.

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?