VERY URGENT, PLEASE HELP WITH ALGEBRA 1 MATH !!!!!!
please look attachment

Answer:
x = 6
Step-by-step explanation:
y = -x - 4
3x + y = 8
Substitute the y with -x - 4
3x - x - 4 = 8
Combine the terms
2x - 4 = 8
Move the constant to the other side
2x - 4 = 8
+4 +4
2x = 12
Divide both sides by 2
2x/2 = 12/2
x = 6