Algebraic Manipulation: Solving Complex Equations

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SUMMARY

The discussion focuses on algebraic manipulation techniques to solve complex equations involving voltage and resistance in electrical circuits. The key takeaway is that by equating two expressions that are both equal to VCC/3, one can derive RBB as a constant multiple of RE. Substituting this relationship into the initial equations yields the desired expression involving VBB, Vf, and VCC. The participant successfully resolved their confusion by following this systematic approach.

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  • Understanding of electrical circuit theory
  • Familiarity with Ohm's Law and voltage division
  • Basic algebraic manipulation skills
  • Knowledge of circuit components such as resistors and voltage sources
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  • Study the principles of voltage division in electrical circuits
  • Learn advanced algebraic techniques for manipulating equations
  • Explore circuit analysis methods using Kirchhoff's laws
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Electrical engineering students, circuit designers, and anyone involved in solving complex equations related to electrical circuits will benefit from this discussion.

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Homework Statement



Somehow the upper two statements are manipulated to get the lower one but i can't work out how... (see attatched image)

Homework Equations



N/A

The Attempt at a Solution



Oh you don't want to see mypages of scribble. I can't get close to that expression!
 

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In the first two equations you have expressions that are both equal to VCC/3, so you can equate the two expressions on the left sides.

Doing that, you can solve for RBB as a constant multiple of RE.

Then, substitute in either of your first two equations to get the desired equation in VBB, Vf, and VCC.
 
ahh, finally got it... the last time i tried to do it that way i got and extra factor somehow and that's what was messing me up.

thanks!
 

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