# math

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during two hours at one area high school there are 3 class changes and two class periods. if the time spent in class is six less than six times the time spent changing classes, how long are the classes at this high school?

• math -

length of class change --- x
length of each class--- y

but y = 6x - 6

3x + 2y = 120
3x + 2(6x-6) = 120
3x + 12x - 12 = 120
15x = 132
x = 8.8
y = 46.8

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