The ice skating rink class charges an hourly fee for skating and $3 to rent skates for the day. gillian rented skates and skates for 3 hours and was charged $21. which equation represents the coast, c(x), of ice skating as a function of x, the number of hours of skating ?

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?