Question 70306
H=RB/(R+B) I ASSUME THE DENOMINATOR IS (R=B). CROSS MULTIPLYING WE GET
H(R+B)=RB
HR+HB=RB
HR-RB=HB
R(H-B)=HB
R=HB/(H-B)
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OTHERWISE THE FORMULA HAS NO R
THUS H=RB/R+B
H=B+B
H=2B