Couldn't you use letters for the constants?
a) Using reduction to echelon form, or otherwise,
i) Find the value of for which these equations do not have a unique solution.
We have: .
If , the system does not have a unique solution.
ii) For this value of , find the value of for which the equations are consistent.
If , then produces a system with an infinite number of solutions.
(If , the system has no solution.)
b) For your values of , find the general solution of these equations.
If and , then  becomes: .
And we have: .
. . which can be written: .
On the right, replace with a parameter
This represents all the solutions to this system of equations.