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A= (a+b+c+d)/4 solve for b
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A= (a+b+c+d)/4 solve for b

User Steve Kline
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1 Answer

4 votes

Answer:

b = 4A-a-c-d

Explanation:

A = (a+b+c+d)/4 |*4

4A = a+b+c+d |-a-c-d

4A-a-c-d = b

User Cronfy
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