Question

9+12m=6+15(m-1) simplifies At how many months the prices are the same

Answer 1

Answer:

m=6

Step-by-step explanation:

We are given that an equation

$9+12m=6+15(m-1)$

We have to find the value of m for which prices are the same.

$9+12m=6+15m-15$

$9-6+12m=15m-15$

Using subtractive property of equality

$3+12m+15=15m$

Using addition property of equality

$12m+18=15m$

$18=15m-12m$

Using subtractive property of equality

$18=3m$

$m=\frac{18}{3}=6$

Using division property of equality