Question

y + -4 = -15

Answer 1

y−4=−15
y=−11

Answer 2

y-4=-15
y= -15+4
y=-11

Answer 3

does that help?

Answer 4

y−4=−15 first you add 4 both side then you will get
y=−11

Answer 5

y+(-4)=-15
So when you add s negative number you will have to subtract.
So we get
y-4=-15
So to get y all alone we have to add 4 on both sides
y-4+4=-15+4
y=-15+4
What is -15+4?
@kristindunn
Also note that -15+4 is the same thing as 4-15