The required system of equations is 
Step-by-step explanation:
We need to write a system of linear equations that has the ordered pair (1,4) as it's solution.
It means we need to find system of linear equations, which after being solved gives x=1 and y=4
Let the system of equations be:

I have made equations such that adding x+y gives 5 i,e (1+4=5) and subtracting x-y gives -3 (1-4=-3)
Now solving this system of equations to find value of x:

Adding eq(1) and eq(2)

Putting value of x=1 into eq(1) to find value of y

The solution set after solving system of equations is (1,4).
The required system of equations is 
Keywords: System of equations
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Answer:

Explanation:
Slope-intercept form formula:

For this formula we need the slope to find the slope use the slope formula:

Plug in the two points (1,-3) and (3,1)

=2
the slope is 2
Now use the slope-interpect formula and plug in the slope (m)

plug in one point I'll use (3,1)

1 = 6 +b
1-6=6-6+b
-5 = b
The equation would be:
Answer:
-6m-n-3
Step-by-step explanation:
Jus
t add then divide then multiply then subtract then u get your answer

notice, the distance is the same, upstream or downstream, thus is "d" for both
solve for "r"