x = 3 and y = 3 Form a simultaneous equation and solve by elimination.
y = 3 x (times) 8.
x=4 y=x+3 y=4+3 y=7
If you already know that x = -3 and y = 5 what linear equations are you wanting to solve?
To me, this looks solved but of you want it in parametrics, y = -3 +2t (teR)
3y=ab. Divide by 3 to get y=ab/3
If you're solving for x, then x = 3/y.
You need more information to solve for x and y. One answer is x=3 and y=1.