Algebra1 Math
posted by Raman .
A moving company charges $800 plus $16 per hour. Another moving company charges $720 plus $21 per hour. How long is job that costs the same no matter which company is used?

Let x = time in hours
Since their costs must be equal,
800 + 16x = 720 + 21x
Solving,
800  720 = 21x  16x
80 = 5x
x = 16 hours
Hope this helps~ :3
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