SOLUTION: I have a word problem that I do not know howto set up the equation?! A hot tub can be filled by one pipe in 15 minutes and by a second pipe in 10 minutes. How long will it take

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Question 466115: I have a word problem that I do not know howto set up the equation?!
A hot tub can be filled by one pipe in 15 minutes and by a second pipe in 10 minutes. How long will it take to fill the hot tub, if they are using both pipes?

Answer by sofiyac(983) About Me  (Show Source):
You can put this solution on YOUR website!
x%2F15%2Bx%2F10=1
10x%2F150%2B15x%2F150=1
%2810x%2B15x%29%2F150=1
25x%2F150=1 cross multiply
25x=150
x=6
so it would take 6 minutes