Question 71870
Use the following formula for computing a bill:
(Cost of meal) + (cost of meal)(tip) = Total bill
.
m+(m)(.15)=65.32 [Plug-in the values; change the percent to a decimal]
m+.15m=65.32
1.15m=65.32 [combine like-terms]
1.15m/1.15=65.32/1.15 [solve for m]
m=56.80
.
Check by plugging in all of the values back into the original equation:

(Cost of meal) + (cost of mean X tip) = Total bill
56.80+(56.80)(.15)=65.32