Answer :
a=tip 1
b=tip 2
t=total tip
c-total cost
a+b=t
53+t=c
53*.06=a
53*.20=b
a=3.18
b=10.60
t=3.18+10.60
t=13.78
c=53+13.78
total cost=$66.78
b=tip 2
t=total tip
c-total cost
a+b=t
53+t=c
53*.06=a
53*.20=b
a=3.18
b=10.60
t=3.18+10.60
t=13.78
c=53+13.78
total cost=$66.78