Answer:
Justin worked as a babysitter 8 hours and worked as a lifeguard 2 hours last week
Step-by-step explanation:
Let
x ----> number of hours worked as a babysitter last week
y ----> number of hours worked as a lifeguard last week
we know that
----> equation A
----> equation B
Solve the system by substitution
Substitute equation B in equation A

solve for y



Find the value of x

therefore
Justin worked as a babysitter 8 hours and worked as a lifeguard 2 hours last week
X=7/4+7/4y ,y∈ (One symbol I can't find but that's what I got)
68 is the correct answer. Thank you for your help! Love doing this!