Math Help - Gradient of a line

Having a bit of trouble, struggling to work out gradient of these lines

a) y = 2x + 3
b) a = -3b + 6
c) k = -l + 12
d) p = 2q - 8

Just rearrange into the form y=mx+c. Then the gradient is the "x" coefficient.

a) 2
b) -3
c) -1
d) 2