Answer :
Answer:
2 hours
Step-by-step explanation:
Given
[tex]Contractor: 81x + 108[/tex]
[tex]Electronic\ Store: 103x + 64[/tex]
Required
Determine the hours when the charges are the same
To do this, we simply equate both expressions:
[tex]Contractor = Electronic\ Store[/tex]
[tex]81x + 108 = 103x + 64[/tex]
Collect Like Terms
[tex]81x - 103x = 64 - 108[/tex]
[tex]-22x = -44[/tex]
Divide both sides by -22
[tex]x =2[/tex]