Anthony paid a20% tip on a $15 bill. what was the total amount anthony paid for dinner. liam paid a 15% tip on his dinner bill. he left the same dollar amount as a tip that anthony left. what was the amount of liam's dinner bill beforethe tip

Liams Dinner Bill before tip=$15.65

Step-by-step explanation:

Total amount Anthony paid=Anthony's Bill+Anthony's Tip

where;

Anthony's Bill=$15

Anthony's Tip=20% of $15=(20/100)×15=$3

Replacing;

Total amount paid by Anthony=(15+3)=$18

Total amount paid by Liam=Liam's Bill+Liam's Tip

where;

Liam's Bill=B

Liam's Tip=15% of B=(15/100)×B=0.15B

Replacing;

Total amount paid by Liam=(B+0.15B)=1.15B

Total amount paid by Anthony=Total amount paid by Liam

18=1.15B

B=(18/1.15)=$15.65

Liams Dinner Bill before tip=B=$15.65

- (2, -7)

- lines r and s and lines t and u must be parallel