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If ( p+q)/(r+s) = (t+ u)/(v+w) , the...

If ` ( p+q)/(r+s) = (t+ u)/(v+w) ` , then express v in terms of p,q,r,s and w.

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The correct Answer is:
` ((t+u)(r+s) -(p+q) w)/(p+q)`
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