Could you please help me with this exercise? Thanks.

Adding and substracting vectors
Solve for the unknown variables:
(a) (a, b) + (3, 0) = (6, 7)
(b) (11, c) + (d, 5) = (-12, −3)
(c) (5, 5) + (e, 4) = (2, f)
(d) (-1, −3) − (5, g) = (h, 2)

no ideas?

For (a) you have a+3=6 and b+0=7
that help?