<PRE><B>Question 256371</B>
let x = number of hours.


55 + 35*x = 75 + 30*x


subtract 30*x from both sides of the equation and subtract 55 from both sides of the equation to get:


5*x = 20


divide both sides of the equation by 5 to get:


x = 4


the total charge should be the same in 4 hours.


55 + 35*4 = 55 + 140 = 195


75 + 30*4 = 75 + 120 = 195


4 hours is confirmed.


that&#39;s your answer.


total charge will be the same for both companies when the number of hours for the job is equal to 4.



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