Question

For the substitution method, is there a right equation to pick from the set and rewrite it?

My problem is
3x-2y=1
2x+4y=1

I chose 2x+4y=2 and came up with x=1-2y which I will later plug into 3x-2y=1.
Or do I have to choose 3x-2y=1? My tactic is picking the equation which will be faster to rewrite but I am not sure if I have to pick one over the other.

Answer 1

choose either one. Sometimes you can avoid nasty fractions, as you did with your choice.

Otherwise, you'd have had x = (2y+1)/3 or y = (3x-1)/2