Use the substitution method to solve the linear system. Thanks!

s= t+4
2t+s=19

s= t+4

2t+s=19

2t + t + 4 = 19
3t = 15
t = 5

s = 5 + 4
s = 9

I have another question.

So I solved the problem but then I have to put it in an ordered pair form. If I was using the variables "x and y," then it would be (x,y) but what if I were using different variables, in this case s and t, how do I know which one is the x and which one would be the y?

To solve the given linear system using the substitution method, we are going to follow three steps:

1. Solve one equation for one variable in terms of the other variable.
2. Substitute this expression into the other equation.
3. Solve the resulting equation for the remaining variable.

Let's start by solving the first equation for "s" in terms of "t":

s = t + 4

Now that we have an expression for "s," we can substitute it into the second equation:

2t + s = 19

Substituting "s = t + 4" into the equation, we get:

2t + (t + 4) = 19

Now we can simplify the equation:

2t + t + 4 = 19
3t + 4 = 19

Next, we isolate "t" by subtracting 4 from both sides of the equation:

3t + 4 - 4 = 19 - 4
3t = 15

Finally, we divide both sides of the equation by 3 to solve for "t":

3t/3 = 15/3
t = 5

Now that we have the value of "t," we can substitute it back into the first equation to solve for "s":

s = t + 4
s = 5 + 4
s = 9

Therefore, the solution to the given linear system is:
t = 5 and s = 9.

I don't know. Please post your last question as a new question.

since you started out with s = t+4

I bet you want to use s for y and t for x

However there is no way for me to tell from what you wrote which is the dependent variable y and which is the independent variable x