solve a system of equations using row reduction and check write the set of the form represented in parametric form

All questions on papers (linear equation problems) need to be answered and some of them need to have a check to proof that answers are correct.
Question 3b is included the numbers that need to be used.( a=2,b=2, c=8, d=3 ).
I need the answers in 2 days Max.

 
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