Question 224068
3x+y=-5 
y=x+3 
solve by substitution.
------------------
Substitute for "y" and solve for "x":
3x + x+3 = -5
4x = -8
x = -2
-------
Substitute into y = x+3 to solve for "y":
y = -2+3 = 1
==================
Cheers,
Stan H.