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antiseptic1488 [7]
4 years ago
8

20 points and brainliest to the fastest, right answer!

Mathematics
2 answers:
mrs_skeptik [129]4 years ago
7 0
Ad=cb
ad=cb
ab=cd
bc=da
bd=ac
1 and 2 are equal
Alla [95]4 years ago
5 0
<span>(a+c)/(b+d) = (a-c) / (b-d)
cross multiply
ab -ad +bc -cd = ab +ad -bc -cd
cancelling ab and -cd, on both sides of eqn

combining like terms
-2ad = -2bc
dividing both sides by (-2)
ad =bc
dividing both sides by (bd)
a/b = c/d,,,,,,,,,as required</span>
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Answer:

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Step-by-step explanation:

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