30. Solve by elimination:
7x + y = -9
-3x - y = 5
B. (1,8)
A. No solution
D. 1,-2)
C. (-2,-3)
31. Solve by substitution:
y = 3x + 14
y = - 4x
D. y = 4
C. y = -2
A
y=8
B. y = 1
32. Solve for x and y
y = 2x + 1
y = 4x-1
D. (3,1)
B. (-1,-3)
C. (-1,3)
A. (1,3)​