Collisions in 1 dimension

My working out is abit long so please bare with me as i have tried this multiple times and still failed:

i was told to always find the momentum and coefficient of restitution for these questions then do simultaneous equations

momentum: $mua+mub = mva + mvb$

$-2(0.3) + 3(0.2) = (0.3)va + (0.2)va$

$0.3va + 0.2vb = 0.5$

coefficient of restitution:

$0.8=\frac{vb-va}{3-2}$

$-va + vb = 0.8$

simultaneous:

0.5vb = 0.74

vb = 1.48 va = 0.68

However the markscheme says my answer should be VA=-0.6 VB=3.4