30/x-y+45/x+y=10;40/x-y+55/x+y=13 solve
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Answer:
- x+y=v x-y=u
- 44/4+30/10,
- div4
- 11/4+15/2u=5/2
- 11/4+8/u=13/5
- 15/2u-8/4=5/2-13/25
- 15-16/2u=25-26/10
- -1/2u=-1/10
- 10=2u
- v=5
- 55/4+40/4=13
- 55/4+40/8=13
- 55/4=13-8=5
- 55/5=u
- u=11
- x+y=11
- x-y=5
- 2x-16
- x=8
- 8-y=5
- y=3
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