Answer:
They are in A. P so the sum will be 2380
In order to solve you get x by itself:
5-x=12
-5 -5
-x=7
divide by negative 1
You will add them all together, then multiply the sum by 6.
713/6 = 118.833333
this rounded to the nearest hundredth
$118.83 per month
Replace y in the second equation with the value of Y from the first equation:
-x - 3 = 5
Add 3 to both sides:
-x = 8
Multiply both sides by -1:
x = -8
The answer is:
(-8,3)