Question 152081
from 2nd eqn __ x=6-3y


substituting into 1st eqn __ 3(6-3y)+5y=12 __ 18-9y+5y=12 __ -4y=-6 __ y=3/2


substituting __ x+3(3/2)=6 __ x+9/2=6 __ x=3/2


so x and y are equal __ maybe that was causing your difficulty