Solve for b A= \frac{a+b}{2}

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asked Sep 7, 2018 91.7k views

1 Answer

Andrew Jay · Answer 1 · 2018-09-14T01:59:34+0000

A = (a+b)/2
2*A = 2*(a+b)/2 ... multiply both sides by 2
2A = a+b
2A-a = a+b-a ... subtract 'a' from both sides to isolate b
2A-a = b
b = 2A-a

Answer: b = 2A-a

Solve for b A= \frac{a+b}{2}

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