Answer:
Part 1. (3, 2), because both lines pass through this point.
Part 2. x + y = 4
Part 3. 2x − y = 26
Step-by-step explanation:
Part 1.
The given system of equations are


Substitute the value of from one equation to another.



Divide both sides by 4.

The value of x is 3. Put this value in the given equation to find the value of y.

The value of y is 2. Both the equations satisfy by the point (2,3) it means the both lines pass through this point.
Therefore (3, 2) is the solution, because both lines pass through this point.
Part 2.
The given equation is

The set of equations has infinitely many solutions if both lines coincide each other.
Taking out the common factors.

Divide both sides by 2.

The line
is equivalent to
. It means both line coincide each other and have infinitely many solutions.
Therefore the required equation of line is x + y = 4.
Part 3.
The one equation of the system of equations is

The solution of the system of equation is (18,10). It means both the equation are satisfied by the point (18,10).
Put x=18 and y=10 in each option.




Therefore the required equation is 2x-y=26.