Hello!
First, let's write some important information below:
• Shelby charges $189 for showing up, plus $61 per hour.
,• Ava charges $153 plus $79 per hour.
• In a determined number of hours, either stylist would cost her the same amount.
Knowing it, let's write it as two equations:
Shelby:
[tex]189+61h[/tex]Ava:
[tex]153+79h[/tex]Remember that in a specific number of hours (h), the cost will be the same. So, we can equal these two equations and find the number h:
[tex]\begin{gathered} 189+61h=153+79h \\ 189-153=79h-61h \\ 36=18h \\ h=\frac{36}{18} \\ \\ \boxed{h=2} \end{gathered}[/tex]So, the number of hours is 2.
The cost will be $311.
[tex]\begin{gathered} 189+61h=153+79h \\ 189+61(2)=153+79(2) \\ 189+122=153+158 \\ 311=311 \end{gathered}[/tex]