Need help solving a vector question

Look at this, 

Let c = (x1,y1) and d = (x2,y2)

c+d = (x1+x2,y1+y2) 

λ(x,y)= (λx,λy) where λ is any number

and as always the multiplication will be executed before addition. 

Good luck and please ask again if you didn't get it:))

headingnorth:

Would it then in this scenario be a+b=(6,1)

and in this case since its -3b I would multiply 5 and -1 with 3.

3b = (15, -3)

and a= (1,2)

or would I use the a+b=6,1) so a-3b = 6-(3*1)

Would the answer be (-14,5) as (1,2)-(15,-3) is equal to (-14,5)

Yes the firs one is right so just add them:)