3x+5y=-7

x+5y=-19

solve using substitution, and it would be great if you could show your work.

I would recommend getting x alone in the second equation so that you can substitute whatever x equals to in the first equation. This is what I'll be doing for my first step:

x=-5y-19

Then, substitution:

3 (-5y-19) + 5y=-7

-15y-57+5y=-7

Add 57 to both sides:

-15y+5y=50

Add like things (the y's):

-10y=50

Divide both sides by - 10 to get y:

y=-5

Substitute - 5 into x=-5y-19:

x=-5 (-5) - 19

x=25-19

x=6

Your answers are x=6, y=-5.