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Sagot :
Answer:
5 hours.
Step-by-step explanation:
Let x be the number of hours.
Abe, a plumber, charges $50 per hour plus $75 for making an in-home visit.
Cost of Abe = [tex]75 + 50x[/tex] ....(1)
The Plumbing Service charges $65 per hour but no set fee for a visit.
Cost of Abe = [tex]65x[/tex] .... (2)
We need to find the hours of pluming work are needed for each to cost the same.
From (1) and (2) we get
[tex]75 + 50x=65x[/tex]
[tex]75=65x-50x[/tex]
[tex]75=15x[/tex]
Divide both sides by 15.
[tex]5=x[/tex]
Therefore, 5 hours of pluming work are needed for each to cost the same.
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