So the problem is 9y+3=5y+13
I would start working from the right side.
Get rid of 5y by adding -5 y. Do the same to 9y. Now your new equation is 4y+3=13
Get rid of the 3 by adding -3 to it. Do the same to the 13 which makes it 10. Now it is 4y=10
y=2.5 since 4 times 2.5 equals 10