SOLUTION: the cost of renting a carpet cleaner is $25 for the first 4 hours and $5 for each additional hour. What was the total lenght of time the cleaner was rented if the cost of the rent

Algebra ->  Equations -> SOLUTION: the cost of renting a carpet cleaner is $25 for the first 4 hours and $5 for each additional hour. What was the total lenght of time the cleaner was rented if the cost of the rent      Log On


   

Question 79436: the cost of renting a carpet cleaner is $25 for the first 4 hours and $5 for each additional hour. What was the total lenght of time the cleaner was rented if the cost of the rental was $45? How can I write this as an equation I think the answer is 8 hours but i don't know how to write it as an equation

same as above write the equation
eight times the sum of a numberand 2 is 10 times that number. What is the number?
I don't have a clue on this one!
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
25+5*H=45
5H=45-25
5H=20
H=20/5
H=4 HOURS AFTER THE ORIGINAL 4. THUS THE TOTAL IS 4+4=8 HOURS FOR THE WHOLE JOB.
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8(N+2)=10N
8N+16=10N
-2N=-16
N=-16/-2
X=8 ANSWER FOR THE NUMBER.
PROOF
8(8+2)=10*8
8*10=10*8
80=80