if a:b=c:d then prove a+b:a-b=c+d:c-d
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Step-by-step a explanation:
Let a/b =k and c/d=k
a+b/a-b= c+d/c-d
bk+b/bk-b = dk+d/dk-d
B(k+1)/b(k-1) = d(k+1)/d(k-1)
(K+1)/k-1 = k+1/k-1
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Step-by-step explanation:
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