a. The first variable is x and the second variable is y.
b. The equations are 
and 
Step-by-step explanation:
Step 1:
The first step is to define the variables. The variables can be any two symbols, letters, characters, etc.
Here let the first variable be x and the let the second variable be y.
So the variables are defined as x and y.
Step 2:
The sum of the given variables is 12.
The first variable + the second variable = 12,
The difference between the two variables is 4.
The first variable - the second variable = 4.
Step 3:
If we add both the equations we get, 
and 
x = 8 and y = 4.
Step-by-step explanation:
wjsixjq's with you and I have a nice day of my life with you to be a good time to do it in a couple days ago and I am looking to get back to the inbox to be a problem with this one and I have a nice day of school and work with you and the other side of things that I have a great day and the other side of my friends in the morning and will have the same to me that I have a great time in total there are any questions or if it is a great weekend as a few months I am going on with your phone is the best regards and thank u very much and have a great time with your phone number and I will be able and I will send you an
Answer:
i think around 10 gallons. im not sure though,
Step-by-step explanation:
Y = 4+3x
2x+1 = y
Rewrite as two systems of equations.
3x - y = -4
2x - y = -1
Now use the substitution method to find the point of intersection.
You can also graph both equations on the same xy-plane using your graphing calculator to find the desired point.
2 = 2(-3) + 8
2 = -6 + 8
2 = 2
true.
2 = 3 + 1
2 = 4
false.
this is not a solution because both equations have to be true.
