For problems 1-4, solve the given system of equations using either substitution or elimination. 1.
2x + y = -8
y = 2x + 4

A. (-4, 0)
B. (-3, -2)
C. (1, 6)
D. infinitely many solutions

2.
10x + 3y = -11
8x + 2y = -6

A. (-2, 3)
B. (-1, 1)
C. (1, -7)
D. No solution.

3.
-3x + 2y = 2
3x + 4y = 13

A. (1, 2.5)
B. (2, 4)
C. No solution
D. Infinitely many solutions

4.
4x - y = -3
-8x + 2y = 6

A. (0, 3)
B. (-2, -5)
C. No solution
D. Infinitely many solutions

I've been trying to figure out these answers for an hour and I still don't understand it :( If anyone could please help out, it would really be appreciated <3​