TV commercials

For the typical one-hour prime-time television slot, the number of minutes of commercials is 3/8 of the minutes of the actual program. Determine how many minutes of the program are shown in that one hour.

Correct result:

x =  43.6 min


a+b=60 a=38b  38b+b=60 b(1+38)=60 b=x=601+38=43.6 min  a=60b=16.36 min

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