SOLUTION: A locksmith charges $40 plus $28 for each lock installed. How many locks can be replaced for $236?

Question 158173: A locksmith charges $40 plus $28 for each lock installed. How many locks can be replaced for $236?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Since the "locksmith charges $40 plus $28 for each lock installed", this means that the cost equation is (note: plug in some values of x so that you have some examples)

Start with the given equation

Since the cost is $236, this means that we need to plug in

Subtract 40 from both sides

Combine like terms.

Divide both sides by 28 to isolate x

So the answer is which means that 7 locks can be replaced for $236.
RELATED QUESTIONS
A locksmith charges $40 plus $28 for each lock installed. How many locks can be replaced... (answered by rfer)

a phone company charges a flat fee of $100 for one phone installation plus $40 for each... (answered by Fombitz)

Allison has 6 keys and 4 locks. Each lock can be locked by only one of the 6 keys, and... (answered by ikleyn,greenestamps)

Locks combinations are made by using 4 digits. How many different lock combinations can... (answered by stanbon)

City bank charges $2.60 a month plus 6 cents per check. How many checks may be written in (answered by jojo14344,josmiceli)

Five locks and five keys of lock fall down to the ground. Then how many tries are needed (answered by richwmiller)

A combination lock for a bicycle contains four digits, each of which can have a value of... (answered by scott8148)

Jolli donuts charges Php 18 each for a special doughnut plus a fixed charge of Php 5 for... (answered by ikleyn)

Please help me solve this problem: Amanda is having new tile installed in her kitchen.... (answered by robertb)