Explanation:
1. w=4 v=-3
2. y=6 x=-2
4. m=6 p=3
5. b=-2 a=4
7. c=8 d=-7
8. g=-3 f=5
10. j=2.5 k=4
11. x=4 y=1.5
13. x=2 y=1
14. y=6 x=5
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