first way is distribute to get
-10=2y-3
add 3 to both sides
-7=2y
divide by 2 both sides
-7/2=y
y=-7/2=-3.5
2nd way
multiply both sides by 4/1
-40=8y-12
add 12 both sides
-28=8y
divide both sides by 8
-28/8=y
y=-28/8
y=-7/2=-3.5
those are 2 ways to solve