Answer:
m=6
Step-by-step explanation:
We are given that an equation
[tex]9+12m=6+15(m-1)[/tex]
We have to find the value of m for which prices are the same.
[tex]9+12m=6+15m-15[/tex]
[tex]9-6+12m=15m-15[/tex]
Using subtractive property of equality
[tex]3+12m+15=15m[/tex]
Using addition property of equality
[tex]12m+18=15m[/tex]
[tex]18=15m-12m[/tex]
Using subtractive property of equality
[tex]18=3m[/tex]
[tex]m=\frac{18}{3}=6[/tex]
Using division property of equality
