hi guys, this is my first post.

wondered is you could help me with these two questions, its the methods i need more than the answers

1) the complex numbers z and w satisfy the simultaneous equations

2z + iw = -1

z - w = 3 + 3i

a) use algebra to find z, giving your answer in the form a+ib, where a and b are real

b) carculate arg z, giving your answer in radians to 2dp.

2) the complex numbers z and w are given by

z = A / (1-i)

w = B / (1-3i)

where A and B are real numbers. given that z + w = i

a) find the value of A and the value of B

b) for these values of A and B, find tan[arg(w-z)]