For this case we must solve each of the equations proposed:
A) 
We apply distributive property to the terms within parentheses:

Subtracting 6 from both sides of the equation we have:

Dividing between -12 on both sides of the equation:

B) 
We apply distributive property to the terms within parentheses:

We add 5m on both sides of the equation:

Dividing between 2 on both sides of the equation:

C) 
We apply distributive property to the terms within parentheses:

We subtract 14 from both sides of the equation:

Dividing between -7 on both sides of the equation:

D) -
We apply distributive property to the terms within parentheses:

We add 28 to both sides of the equation:

Dividing between -21 on both sides of the equation:

Answer:

Answer:

Step-by-step explanation:
To preface, your figure is going to be a line segment, with
as your midpoint, in between points
& 
With that being said:

Identify your values:

Substitute the values into the first equation:

Combine like terms:

Subtract
from both sides of the equation:

Divide by the coefficient of
, which is
:

Substitute
for
in segments
&
:




Solve:


Check your answers by substituting:


Answer: 72 miles
Step-by-step explanation:
This is your genuine answer