To solve these systems of equations, we can use the substitution method.

1) 3x + 4y = 24
-1.5 + y = -3

First, solve the second equation for y:
y = -3 + 1.5
y = -1.5

Now substitute y = -1.5 into the first equation:
3x + 4(-1.5) = 24
3x - 6 = 24
3x = 30
x = 10

So the solution to the first system is x = 10, y = -1.5.

2) x + 2y = -6
x + 2y = 4

These equations are inconsistent since they cannot both be true at the same time.