Can anyone help me with these momentum problems anything with x is the value that needs to be found thanks?

Elastic Momentum: before collision: 1) m1 = 2kg; m2 = 2kg; v1 = 1.5 m/s; v2 = x; p(total) = 0 after collision: v1 = -1.5 kg*m/s; v2 = 1.5 kg*m/s; total momentum after collision: p(m1)+p(m2) = 0 kg*m/s before collision: 2) m1 = 2.5kg; m2 = 5kg; v1 = x ; v2 = -1m/s; p(total) = 0 kg*m/s after collision: v1 =... show more Elastic Momentum:
before collision:
1) m1 = 2kg; m2 = 2kg; v1 = 1.5 m/s; v2 = x; p(total) = 0
after collision:
v1 = -1.5 kg*m/s; v2 = 1.5 kg*m/s;
total momentum after collision:
p(m1)+p(m2) = 0 kg*m/s

before collision:
2) m1 = 2.5kg; m2 = 5kg; v1 = x ; v2 = -1m/s; p(total) = 0 kg*m/s
after collision:
v1 = unknown; v2 = unknown
total momentum after collision:
p(m1)+p(m2) = unknown

before collision:
3) m1 = 3kg; m2 = 6kg; v1 = 2m/s ; v2 = 0m/s; p(total) = x
after collision:
v1 = unknown; v2 = unknown
total momentum after collision:
p(m1)+p(m2) = unknown

before collision:
4) m1 = 6kg; m2 = x; v1 = 2m/s ; v2 = -1m/s; p(total) = 8 kg*m/s
after collision:
v1 = unknown; v2 = unknown
total momentum after collision:
p(m1)+p(m2) = unknown

InElastic Collison:
before collision:
1) m1 = 10kg; m2 = x; v1 = 2 m/s; v2 = -1m/s; p(total) =10 kg *m/s
after collision:
v1 = unknown; v2 = unknown;
total momentum after collision:
p(m1)+p(m2) = unknown
Update: i meant elastic collision sorry
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