Substitution would be the simplest method of solution for which system? ?

Question

5/3x=6yand2x-3y=8

y=2xandx+y=28

3x-2y=18and4x+5y=60

Answer 1

Looks like the second one in my opinion,

y=2xandx+y=28

because you aready have one equation solved for y.  Then you can just plug it into the other equation.

Answer 2

y = 2x and x + y = 28 because one of the variables is already solved for. You can automatically substitute 2x for y into the other equation.

Answer 3

y=2xandx+y=28 because you already have one variable solved for